diff --git a/frontend/src/controllers/groups.ts b/frontend/src/controllers/groups.ts
index de6592b5..4c38290f 100644
--- a/frontend/src/controllers/groups.ts
+++ b/frontend/src/controllers/groups.ts
@@ -36,11 +36,11 @@ export class GroupController extends BaseController {
         return this.put<GroupResponse>(`/${num}`, data);
     }
 
-    async getSubmissions(groupNumber: number, full = true): Promise<SubmissionsResponse> {
-        return this.get<SubmissionsResponse>(`/${groupNumber}/submissions`, { full });
+    async getSubmissions(num: number, full = true): Promise<SubmissionsResponse> {
+        return this.get<SubmissionsResponse>(`/${num}/submissions`, { full });
     }
 
-    async getQuestions(groupNumber: number, full = true): Promise<QuestionsResponse> {
-        return this.get<QuestionsResponse>(`/${groupNumber}/questions`, { full });
+    async getQuestions(num: number, full = true): Promise<QuestionsResponse> {
+        return this.get<QuestionsResponse>(`/${num}/questions`, { full });
     }
 }
diff --git a/frontend/src/controllers/submissions.ts b/frontend/src/controllers/submissions.ts
index 837d356c..0d9c73f0 100644
--- a/frontend/src/controllers/submissions.ts
+++ b/frontend/src/controllers/submissions.ts
@@ -11,7 +11,7 @@ export interface SubmissionResponse {
 
 export class SubmissionController extends BaseController {
     constructor(classid: string, assignmentNumber: number, groupNumber: number) {
-        super(`class/${classid}/assignments/${assignmentNumber}/groups/${groupNumber}`);
+        super(`class/${classid}/assignments/${assignmentNumber}/groups/${groupNumber}/submissions`);
     }
 
     async getAll(full = true): Promise<SubmissionsResponse> {
@@ -22,7 +22,7 @@ export class SubmissionController extends BaseController {
         return this.get<SubmissionResponse>(`/${submissionNumber}`);
     }
 
-    async createSubmission(data: unknown): Promise<SubmissionResponse> {
+    async createSubmission(data: SubmissionDTO): Promise<SubmissionResponse> {
         return this.post<SubmissionResponse>(`/`, data);
     }
 
diff --git a/frontend/src/queries/assignments.ts b/frontend/src/queries/assignments.ts
new file mode 100644
index 00000000..3251836a
--- /dev/null
+++ b/frontend/src/queries/assignments.ts
@@ -0,0 +1,188 @@
+import { AssignmentController, type AssignmentResponse, type AssignmentsResponse } from "@/controllers/assignments";
+import type { QuestionsResponse } from "@/controllers/questions";
+import type { SubmissionsResponse } from "@/controllers/submissions";
+import {
+    useMutation,
+    useQuery,
+    useQueryClient,
+    type UseMutationReturnType,
+    type UseQueryReturnType,
+} from "@tanstack/vue-query";
+import { computed, toValue, type MaybeRefOrGetter } from "vue";
+import { groupsQueryKey, invalidateAllGroupKeys } from "./groups";
+import type { GroupsResponse } from "@/controllers/groups";
+import type { AssignmentDTO } from "@dwengo-1/common/interfaces/assignment";
+import type { QueryClient } from "@tanstack/react-query";
+import { invalidateAllSubmissionKeys } from "./submissions";
+
+function assignmentsQueryKey(classid: string, full: boolean) {
+    return ["assignments", classid, full];
+}
+function assignmentQueryKey(classid: string, assignmentNumber: number) {
+    return ["assignment", classid, assignmentNumber];
+}
+function assignmentSubmissionsQueryKey(classid: string, assignmentNumber: number, full: boolean) {
+    return ["assignment-submissions", classid, assignmentNumber, full];
+}
+function assignmentQuestionsQueryKey(classid: string, assignmentNumber: number, full: boolean) {
+    return ["assignment-questions", classid, assignmentNumber, full];
+}
+
+export async function invalidateAllAssignmentKeys(
+    queryClient: QueryClient,
+    classid?: string,
+    assignmentNumber?: number,
+) {
+    const keys = ["assignment", "assignment-submissions", "assignment-questions"];
+
+    for (const key of keys) {
+        const queryKey = [key, classid, assignmentNumber].filter((arg) => arg !== undefined);
+        await queryClient.invalidateQueries({ queryKey: queryKey });
+    }
+
+    await queryClient.invalidateQueries({ queryKey: ["assignments", classid].filter((arg) => arg !== undefined) });
+}
+
+function checkEnabled(
+    classid: string | undefined,
+    assignmentNumber: number | undefined,
+    groupNumber: number | undefined,
+): boolean {
+    return Boolean(classid) && !isNaN(Number(groupNumber)) && !isNaN(Number(assignmentNumber));
+}
+function toValues(
+    classid: MaybeRefOrGetter<string | undefined>,
+    assignmentNumber: MaybeRefOrGetter<number | undefined>,
+    groupNumber: MaybeRefOrGetter<number | undefined>,
+    full: MaybeRefOrGetter<boolean>,
+) {
+    return { cid: toValue(classid), an: toValue(assignmentNumber), gn: toValue(groupNumber), f: toValue(full) };
+}
+
+export function useAssignmentsQuery(
+    classid: MaybeRefOrGetter<string | undefined>,
+    full: MaybeRefOrGetter<boolean> = true,
+): UseQueryReturnType<AssignmentsResponse, Error> {
+    const { cid, f } = toValues(classid, 1, 1, full);
+
+    return useQuery({
+        queryKey: computed(() => assignmentsQueryKey(cid!, f)),
+        queryFn: async () => new AssignmentController(cid!).getAll(f),
+        enabled: () => checkEnabled(cid, 1, 1),
+    });
+}
+
+export function useAssignmentQuery(
+    classid: MaybeRefOrGetter<string | undefined>,
+    assignmentNumber: MaybeRefOrGetter<number | undefined>,
+): UseQueryReturnType<AssignmentsResponse, Error> {
+    const { cid, an } = toValues(classid, assignmentNumber, 1, true);
+
+    return useQuery({
+        queryKey: computed(() => assignmentQueryKey(cid!, an!)),
+        queryFn: async () => new AssignmentController(cid!).getByNumber(an!),
+        enabled: () => checkEnabled(cid, an, 1),
+    });
+}
+
+export function useCreateAssignmentMutation(): UseMutationReturnType<
+    AssignmentResponse,
+    Error,
+    { cid: string; data: AssignmentDTO },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ cid, data }) => new AssignmentController(cid).createAssignment(data),
+        onSuccess: async (_) => {
+            await queryClient.invalidateQueries({ queryKey: ["assignments"] });
+        },
+    });
+}
+
+export function useDeleteAssignmentMutation(): UseMutationReturnType<
+    AssignmentResponse,
+    Error,
+    { cid: string; an: number },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ cid, an }) => new AssignmentController(cid).deleteAssignment(an),
+        onSuccess: async (response) => {
+            const cid = response.assignment.within;
+            const an = response.assignment.id;
+
+            await invalidateAllAssignmentKeys(queryClient, cid, an);
+            await invalidateAllGroupKeys(queryClient, cid, an);
+            await invalidateAllSubmissionKeys(queryClient, cid, an);
+        },
+    });
+}
+
+export function useUpdateAssignmentMutation(): UseMutationReturnType<
+    AssignmentResponse,
+    Error,
+    { cid: string; an: number; data: Partial<AssignmentDTO> },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ cid, an, data }) => new AssignmentController(cid).updateAssignment(an, data),
+        onSuccess: async (response) => {
+            const cid = response.assignment.within;
+            const an = response.assignment.id;
+
+            await invalidateAllGroupKeys(queryClient, cid, an);
+            await queryClient.invalidateQueries({ queryKey: ["assignments"] });
+        },
+    });
+}
+
+export function useAssignmentSubmissionsQuery(
+    classid: MaybeRefOrGetter<string | undefined>,
+    assignmentNumber: MaybeRefOrGetter<number | undefined>,
+    groupNumber: MaybeRefOrGetter<number | undefined>,
+    full: MaybeRefOrGetter<boolean> = true,
+): UseQueryReturnType<SubmissionsResponse, Error> {
+    const { cid, an, gn, f } = toValues(classid, assignmentNumber, groupNumber, full);
+
+    return useQuery({
+        queryKey: computed(() => assignmentSubmissionsQueryKey(cid!, an!, f)),
+        queryFn: async () => new AssignmentController(cid!).getSubmissions(gn!, f),
+        enabled: () => checkEnabled(cid, an, gn),
+    });
+}
+
+export function useAssignmentQuestionsQuery(
+    classid: MaybeRefOrGetter<string | undefined>,
+    assignmentNumber: MaybeRefOrGetter<number | undefined>,
+    groupNumber: MaybeRefOrGetter<number | undefined>,
+    full: MaybeRefOrGetter<boolean> = true,
+): UseQueryReturnType<QuestionsResponse, Error> {
+    const { cid, an, gn, f } = toValues(classid, assignmentNumber, groupNumber, full);
+
+    return useQuery({
+        queryKey: computed(() => assignmentQuestionsQueryKey(cid!, an!, f)),
+        queryFn: async () => new AssignmentController(cid!).getQuestions(gn!, f),
+        enabled: () => checkEnabled(cid, an, gn),
+    });
+}
+
+export function useAssignmentGroupsQuery(
+    classid: MaybeRefOrGetter<string | undefined>,
+    assignmentNumber: MaybeRefOrGetter<number | undefined>,
+    groupNumber: MaybeRefOrGetter<number | undefined>,
+    full: MaybeRefOrGetter<boolean> = true,
+): UseQueryReturnType<GroupsResponse, Error> {
+    const { cid, an, gn, f } = toValues(classid, assignmentNumber, groupNumber, full);
+
+    return useQuery({
+        queryKey: computed(() => groupsQueryKey(cid!, an!, f)),
+        queryFn: async () => new AssignmentController(cid!).getQuestions(gn!, f),
+        enabled: () => checkEnabled(cid, an, gn),
+    });
+}
diff --git a/frontend/src/queries/classes.ts b/frontend/src/queries/classes.ts
new file mode 100644
index 00000000..68ba0127
--- /dev/null
+++ b/frontend/src/queries/classes.ts
@@ -0,0 +1,224 @@
+import { ClassController, type ClassesResponse, type ClassResponse } from "@/controllers/classes";
+import type { StudentsResponse } from "@/controllers/students";
+import type { ClassDTO } from "@dwengo-1/common/interfaces/class";
+import {
+    QueryClient,
+    useMutation,
+    useQuery,
+    useQueryClient,
+    type UseMutationReturnType,
+    type UseQueryReturnType,
+} from "@tanstack/vue-query";
+import { computed, toValue, type MaybeRefOrGetter } from "vue";
+import { invalidateAllAssignmentKeys } from "./assignments";
+import { invalidateAllGroupKeys } from "./groups";
+import { invalidateAllSubmissionKeys } from "./submissions";
+
+const classController = new ClassController();
+
+/* Query cache keys */
+function classesQueryKey(full: boolean) {
+    return ["classes", full];
+}
+function classQueryKey(classid: string) {
+    return ["class", classid];
+}
+function classStudentsKey(classid: string, full: boolean) {
+    return ["class-students", classid, full];
+}
+function classTeachersKey(classid: string, full: boolean) {
+    return ["class-teachers", classid, full];
+}
+function classTeacherInvitationsKey(classid: string, full: boolean) {
+    return ["class-teacher-invitations", classid, full];
+}
+function classAssignmentsKey(classid: string, full: boolean) {
+    return ["class-assignments", classid, full];
+}
+
+export async function invalidateAllClassKeys(queryClient: QueryClient, classid?: string) {
+    const keys = ["class", "class-students", "class-teachers", "class-teacher-invitations", "class-assignments"];
+
+    for (const key of keys) {
+        const queryKey = [key, classid].filter((arg) => arg !== undefined);
+        await queryClient.invalidateQueries({ queryKey: queryKey });
+    }
+
+    await queryClient.invalidateQueries({ queryKey: ["classes"] });
+}
+
+/* Queries */
+export function useClassesQuery(full: MaybeRefOrGetter<boolean> = true): UseQueryReturnType<ClassesResponse, Error> {
+    return useQuery({
+        queryKey: computed(() => classesQueryKey(toValue(full))),
+        queryFn: async () => classController.getAll(toValue(full)),
+    });
+}
+
+export function useClassQuery(id: MaybeRefOrGetter<string | undefined>): UseQueryReturnType<ClassResponse, Error> {
+    return useQuery({
+        queryKey: computed(() => classQueryKey(toValue(id)!)),
+        queryFn: async () => classController.getById(toValue(id)!),
+        enabled: () => Boolean(toValue(id)),
+    });
+}
+
+export function useCreateClassMutation(): UseMutationReturnType<ClassResponse, Error, ClassDTO, unknown> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async (data) => classController.createClass(data),
+        onSuccess: async () => {
+            await queryClient.invalidateQueries({ queryKey: ["classes"] });
+        },
+    });
+}
+
+export function useDeleteClassMutation(): UseMutationReturnType<ClassResponse, Error, string, unknown> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async (id) => classController.deleteClass(id),
+        onSuccess: async (data) => {
+            await invalidateAllClassKeys(queryClient, data.class.id);
+            await invalidateAllAssignmentKeys(queryClient, data.class.id);
+            await invalidateAllGroupKeys(queryClient, data.class.id);
+            await invalidateAllSubmissionKeys(queryClient, data.class.id);
+        },
+    });
+}
+
+export function useUpdateClassMutation(): UseMutationReturnType<
+    ClassResponse,
+    Error,
+    { cid: string; data: Partial<ClassDTO> },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ cid, data }) => classController.updateClass(cid, data),
+        onSuccess: async (data) => {
+            await invalidateAllClassKeys(queryClient, data.class.id);
+            await invalidateAllAssignmentKeys(queryClient, data.class.id);
+            await invalidateAllGroupKeys(queryClient, data.class.id);
+            await invalidateAllSubmissionKeys(queryClient, data.class.id);
+        },
+    });
+}
+
+export function useClassStudentsQuery(
+    id: MaybeRefOrGetter<string | undefined>,
+    full: MaybeRefOrGetter<boolean> = true,
+): UseQueryReturnType<StudentsResponse, Error> {
+    return useQuery({
+        queryKey: computed(() => classStudentsKey(toValue(id)!, toValue(full))),
+        queryFn: async () => classController.getStudents(toValue(id)!, toValue(full)),
+        enabled: () => Boolean(toValue(id)),
+    });
+}
+
+export function useClassAddStudentMutation(): UseMutationReturnType<
+    ClassResponse,
+    Error,
+    { id: string; username: string },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ id, username }) => classController.addStudent(id, username),
+        onSuccess: async (data) => {
+            await queryClient.invalidateQueries({ queryKey: classQueryKey(data.class.id) });
+            await queryClient.invalidateQueries({ queryKey: classStudentsKey(data.class.id, true) });
+            await queryClient.invalidateQueries({ queryKey: classStudentsKey(data.class.id, false) });
+        },
+    });
+}
+
+export function useClassDeleteStudentMutation(): UseMutationReturnType<
+    ClassResponse,
+    Error,
+    { id: string; username: string },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ id, username }) => classController.deleteStudent(id, username),
+        onSuccess: async (data) => {
+            await queryClient.invalidateQueries({ queryKey: classQueryKey(data.class.id) });
+            await queryClient.invalidateQueries({ queryKey: classStudentsKey(data.class.id, true) });
+            await queryClient.invalidateQueries({ queryKey: classStudentsKey(data.class.id, false) });
+        },
+    });
+}
+
+export function useClassTeachersQuery(
+    id: MaybeRefOrGetter<string | undefined>,
+    full: MaybeRefOrGetter<boolean> = true,
+): UseQueryReturnType<StudentsResponse, Error> {
+    return useQuery({
+        queryKey: computed(() => classTeachersKey(toValue(id)!, toValue(full))),
+        queryFn: async () => classController.getTeachers(toValue(id)!, toValue(full)),
+        enabled: () => Boolean(toValue(id)),
+    });
+}
+
+export function useClassAddTeacherMutation(): UseMutationReturnType<
+    ClassResponse,
+    Error,
+    { id: string; username: string },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ id, username }) => classController.addTeacher(id, username),
+        onSuccess: async (data) => {
+            await queryClient.invalidateQueries({ queryKey: classQueryKey(data.class.id) });
+            await queryClient.invalidateQueries({ queryKey: classTeachersKey(data.class.id, true) });
+            await queryClient.invalidateQueries({ queryKey: classTeachersKey(data.class.id, false) });
+        },
+    });
+}
+
+export function useClassDeleteTeacherMutation(): UseMutationReturnType<
+    ClassResponse,
+    Error,
+    { id: string; username: string },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ id, username }) => classController.deleteTeacher(id, username),
+        onSuccess: async (data) => {
+            await queryClient.invalidateQueries({ queryKey: classQueryKey(data.class.id) });
+            await queryClient.invalidateQueries({ queryKey: classTeachersKey(data.class.id, true) });
+            await queryClient.invalidateQueries({ queryKey: classTeachersKey(data.class.id, false) });
+        },
+    });
+}
+
+export function useClassTeacherInvitationsQuery(
+    id: MaybeRefOrGetter<string | undefined>,
+    full: MaybeRefOrGetter<boolean> = true,
+): UseQueryReturnType<StudentsResponse, Error> {
+    return useQuery({
+        queryKey: computed(() => classTeacherInvitationsKey(toValue(id)!, toValue(full))),
+        queryFn: async () => classController.getTeacherInvitations(toValue(id)!, toValue(full)),
+        enabled: () => Boolean(toValue(id)),
+    });
+}
+
+export function useClassAssignmentsQuery(
+    id: MaybeRefOrGetter<string | undefined>,
+    full: MaybeRefOrGetter<boolean> = true,
+): UseQueryReturnType<StudentsResponse, Error> {
+    return useQuery({
+        queryKey: computed(() => classAssignmentsKey(toValue(id)!, toValue(full))),
+        queryFn: async () => classController.getAssignments(toValue(id)!, toValue(full)),
+        enabled: () => Boolean(toValue(id)),
+    });
+}
diff --git a/frontend/src/queries/groups.ts b/frontend/src/queries/groups.ts
new file mode 100644
index 00000000..cdef2899
--- /dev/null
+++ b/frontend/src/queries/groups.ts
@@ -0,0 +1,191 @@
+import type { ClassesResponse } from "@/controllers/classes";
+import { GroupController, type GroupResponse, type GroupsResponse } from "@/controllers/groups";
+import type { QuestionsResponse } from "@/controllers/questions";
+import type { SubmissionsResponse } from "@/controllers/submissions";
+import type { GroupDTO } from "@dwengo-1/common/interfaces/group";
+import {
+    QueryClient,
+    useMutation,
+    useQuery,
+    useQueryClient,
+    type UseMutationReturnType,
+    type UseQueryReturnType,
+} from "@tanstack/vue-query";
+import { computed, toValue, type MaybeRefOrGetter } from "vue";
+import { invalidateAllAssignmentKeys } from "./assignments";
+import { invalidateAllSubmissionKeys } from "./submissions";
+
+export function groupsQueryKey(classid: string, assignmentNumber: number, full: boolean) {
+    return ["groups", classid, assignmentNumber, full];
+}
+function groupQueryKey(classid: string, assignmentNumber: number, groupNumber: number) {
+    return ["group", classid, assignmentNumber, groupNumber];
+}
+function groupSubmissionsQueryKey(classid: string, assignmentNumber: number, groupNumber: number, full: boolean) {
+    return ["group-submissions", classid, assignmentNumber, groupNumber, full];
+}
+function groupQuestionsQueryKey(classid: string, assignmentNumber: number, groupNumber: number, full: boolean) {
+    return ["group-questions", classid, assignmentNumber, groupNumber, full];
+}
+
+export async function invalidateAllGroupKeys(
+    queryClient: QueryClient,
+    classid?: string,
+    assignmentNumber?: number,
+    groupNumber?: number,
+) {
+    const keys = ["group", "group-submissions", "group-questions"];
+
+    for (const key of keys) {
+        const queryKey = [key, classid, assignmentNumber, groupNumber].filter((arg) => arg !== undefined);
+        await queryClient.invalidateQueries({ queryKey: queryKey });
+    }
+
+    await queryClient.invalidateQueries({
+        queryKey: ["groups", classid, assignmentNumber].filter((arg) => arg !== undefined),
+    });
+}
+
+function checkEnabled(
+    classid: string | undefined,
+    assignmentNumber: number | undefined,
+    groupNumber: number | undefined,
+): boolean {
+    return Boolean(classid) && !isNaN(Number(groupNumber)) && !isNaN(Number(assignmentNumber));
+}
+function toValues(
+    classid: MaybeRefOrGetter<string | undefined>,
+    assignmentNumber: MaybeRefOrGetter<number | undefined>,
+    groupNumber: MaybeRefOrGetter<number | undefined>,
+    full: MaybeRefOrGetter<boolean>,
+) {
+    return { cid: toValue(classid), an: toValue(assignmentNumber), gn: toValue(groupNumber), f: toValue(full) };
+}
+
+export function useGroupsQuery(
+    classid: MaybeRefOrGetter<string | undefined>,
+    assignmentNumber: MaybeRefOrGetter<number | undefined>,
+    full: MaybeRefOrGetter<boolean> = true,
+): UseQueryReturnType<GroupsResponse, Error> {
+    const { cid, an, f } = toValues(classid, assignmentNumber, 1, full);
+
+    return useQuery({
+        queryKey: computed(() => groupsQueryKey(cid!, an!, f)),
+        queryFn: async () => new GroupController(cid!, an!).getAll(f),
+        enabled: () => checkEnabled(cid, an, 1),
+    });
+}
+
+export function useGroupQuery(
+    classid: MaybeRefOrGetter<string | undefined>,
+    assignmentNumber: MaybeRefOrGetter<number | undefined>,
+    groupNumber: MaybeRefOrGetter<number | undefined>,
+): UseQueryReturnType<GroupResponse, Error> {
+    const { cid, an, gn } = toValues(classid, assignmentNumber, groupNumber, true);
+
+    return useQuery({
+        queryKey: computed(() => groupQueryKey(cid!, an!, gn!)),
+        queryFn: async () => new GroupController(cid!, an!).getByNumber(gn!),
+        enabled: () => checkEnabled(cid, an, gn),
+    });
+}
+
+export function useCreateGroupMutation(): UseMutationReturnType<
+    GroupResponse,
+    Error,
+    { cid: string; an: number; data: GroupDTO },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ cid, an, data }) => new GroupController(cid, an).createGroup(data),
+        onSuccess: async (response) => {
+            const cid = typeof response.group.class === "string" ? response.group.class : response.group.class.id;
+            const an =
+                typeof response.group.assignment === "number"
+                    ? response.group.assignment
+                    : response.group.assignment.id;
+
+            await queryClient.invalidateQueries({ queryKey: groupsQueryKey(cid, an, true) });
+            await queryClient.invalidateQueries({ queryKey: groupsQueryKey(cid, an, false) });
+        },
+    });
+}
+
+export function useDeleteGroupMutation(): UseMutationReturnType<
+    GroupResponse,
+    Error,
+    { cid: string; an: number; gn: number },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ cid, an, gn }) => new GroupController(cid, an).deleteGroup(gn),
+        onSuccess: async (response) => {
+            const cid = typeof response.group.class === "string" ? response.group.class : response.group.class.id;
+            const an =
+                typeof response.group.assignment === "number"
+                    ? response.group.assignment
+                    : response.group.assignment.id;
+            const gn = response.group.groupNumber;
+
+            await invalidateAllGroupKeys(queryClient, cid, an, gn);
+            await invalidateAllSubmissionKeys(queryClient, cid, an, gn);
+        },
+    });
+}
+
+export function useUpdateGroupMutation(): UseMutationReturnType<
+    GroupResponse,
+    Error,
+    { cid: string; an: number; gn: number; data: Partial<GroupDTO> },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ cid, an, gn, data }) => new GroupController(cid, an).updateGroup(gn, data),
+        onSuccess: async (response) => {
+            const cid = typeof response.group.class === "string" ? response.group.class : response.group.class.id;
+            const an =
+                typeof response.group.assignment === "number"
+                    ? response.group.assignment
+                    : response.group.assignment.id;
+            const gn = response.group.groupNumber;
+
+            await invalidateAllGroupKeys(queryClient, cid, an, gn);
+        },
+    });
+}
+
+export function useGroupSubmissionsQuery(
+    classid: MaybeRefOrGetter<string | undefined>,
+    assignmentNumber: MaybeRefOrGetter<number | undefined>,
+    groupNumber: MaybeRefOrGetter<number | undefined>,
+    full: MaybeRefOrGetter<boolean> = true,
+): UseQueryReturnType<SubmissionsResponse, Error> {
+    const { cid, an, gn, f } = toValues(classid, assignmentNumber, groupNumber, full);
+
+    return useQuery({
+        queryKey: computed(() => groupSubmissionsQueryKey(cid!, an!, gn!, f)),
+        queryFn: async () => new GroupController(cid!, an!).getSubmissions(gn!, f),
+        enabled: () => checkEnabled(cid, an, gn),
+    });
+}
+
+export function useGroupQuestionsQuery(
+    classid: MaybeRefOrGetter<string | undefined>,
+    assignmentNumber: MaybeRefOrGetter<number | undefined>,
+    groupNumber: MaybeRefOrGetter<number | undefined>,
+    full: MaybeRefOrGetter<boolean> = true,
+): UseQueryReturnType<QuestionsResponse, Error> {
+    const { cid, an, gn, f } = toValues(classid, assignmentNumber, groupNumber, full);
+
+    return useQuery({
+        queryKey: computed(() => groupQuestionsQueryKey(cid!, an!, gn!, f)),
+        queryFn: async () => new GroupController(cid!, an!).getSubmissions(gn!, f),
+        enabled: () => checkEnabled(cid, an, gn),
+    });
+}
diff --git a/frontend/src/queries/submissions.ts b/frontend/src/queries/submissions.ts
new file mode 100644
index 00000000..97effd15
--- /dev/null
+++ b/frontend/src/queries/submissions.ts
@@ -0,0 +1,157 @@
+import { SubmissionController, type SubmissionResponse, type SubmissionsResponse } from "@/controllers/submissions";
+import type { SubmissionDTO } from "@dwengo-1/common/interfaces/submission";
+import {
+    QueryClient,
+    useMutation,
+    useQuery,
+    useQueryClient,
+    type UseMutationReturnType,
+    type UseQueryReturnType,
+} from "@tanstack/vue-query";
+import { computed, toValue, type MaybeRefOrGetter } from "vue";
+
+function submissionsQueryKey(classid: string, assignmentNumber: number, groupNumber: number, full: boolean) {
+    return ["submissions", classid, assignmentNumber, groupNumber, full];
+}
+function submissionQueryKey(classid: string, assignmentNumber: number, groupNumber: number, submissionNumber: number) {
+    return ["submission", classid, assignmentNumber, groupNumber, submissionNumber];
+}
+
+export async function invalidateAllSubmissionKeys(
+    queryClient: QueryClient,
+    classid?: string,
+    assignmentNumber?: number,
+    groupNumber?: number,
+    submissionNumber?: number,
+) {
+    const keys = ["submission"];
+
+    for (const key of keys) {
+        const queryKey = [key, classid, assignmentNumber, groupNumber, submissionNumber].filter(
+            (arg) => arg !== undefined,
+        );
+        await queryClient.invalidateQueries({ queryKey: queryKey });
+    }
+
+    await queryClient.invalidateQueries({
+        queryKey: ["submissions", classid, assignmentNumber, groupNumber].filter((arg) => arg !== undefined),
+    });
+    await queryClient.invalidateQueries({
+        queryKey: ["group-submissions", classid, assignmentNumber, groupNumber].filter((arg) => arg !== undefined),
+    });
+    await queryClient.invalidateQueries({
+        queryKey: ["assignment-submissions", classid, assignmentNumber].filter((arg) => arg !== undefined),
+    });
+}
+
+function checkEnabled(
+    classid: string | undefined,
+    assignmentNumber: number | undefined,
+    groupNumber: number | undefined,
+    submissionNumber: number | undefined,
+): boolean {
+    return (
+        Boolean(classid) &&
+        !isNaN(Number(groupNumber)) &&
+        !isNaN(Number(assignmentNumber)) &&
+        !isNaN(Number(submissionNumber))
+    );
+}
+function toValues(
+    classid: MaybeRefOrGetter<string | undefined>,
+    assignmentNumber: MaybeRefOrGetter<number | undefined>,
+    groupNumber: MaybeRefOrGetter<number | undefined>,
+    submissionNumber: MaybeRefOrGetter<number | undefined>,
+    full: MaybeRefOrGetter<boolean>,
+) {
+    return {
+        cid: toValue(classid),
+        an: toValue(assignmentNumber),
+        gn: toValue(groupNumber),
+        sn: toValue(submissionNumber),
+        f: toValue(full),
+    };
+}
+
+export function useSubmissionsQuery(
+    classid: MaybeRefOrGetter<string | undefined>,
+    assignmentNumber: MaybeRefOrGetter<number | undefined>,
+    groupNumber: MaybeRefOrGetter<number | undefined>,
+    full: MaybeRefOrGetter<boolean> = true,
+): UseQueryReturnType<SubmissionsResponse, Error> {
+    const { cid, an, gn, sn, f } = toValues(classid, assignmentNumber, groupNumber, 1, full);
+
+    return useQuery({
+        queryKey: computed(() => submissionsQueryKey(cid!, an!, gn!, f)),
+        queryFn: async () => new SubmissionController(cid!, an!, gn!).getAll(f),
+        enabled: () => checkEnabled(cid, an, gn, sn),
+    });
+}
+
+export function useSubmissionQuery(
+    classid: MaybeRefOrGetter<string | undefined>,
+    assignmentNumber: MaybeRefOrGetter<number | undefined>,
+    groupNumber: MaybeRefOrGetter<number | undefined>,
+): UseQueryReturnType<SubmissionResponse, Error> {
+    const { cid, an, gn, sn, f } = toValues(classid, assignmentNumber, groupNumber, 1, true);
+
+    return useQuery({
+        queryKey: computed(() => submissionQueryKey(cid!, an!, gn!, sn!)),
+        queryFn: async () => new SubmissionController(cid!, an!, gn!).getByNumber(sn!),
+        enabled: () => checkEnabled(cid, an, gn, sn),
+    });
+}
+
+export function useCreateSubmissionMutation(): UseMutationReturnType<
+    SubmissionResponse,
+    Error,
+    { cid: string; an: number; gn: number; data: SubmissionDTO },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ cid, an, gn, data }) => new SubmissionController(cid, an, gn).createSubmission(data),
+        onSuccess: async (response) => {
+            if (!response.submission.group) {
+                await invalidateAllSubmissionKeys(queryClient);
+            } else {
+                const cls = response.submission.group.class;
+                const assignment = response.submission.group.assignment;
+
+                const cid = typeof cls === "string" ? cls : cls.id;
+                const an = typeof assignment === "number" ? assignment : assignment.id;
+                const gn = response.submission.group.groupNumber;
+
+                await invalidateAllSubmissionKeys(queryClient, cid, an, gn);
+            }
+        },
+    });
+}
+
+export function useDeleteSubmissionMutation(): UseMutationReturnType<
+    SubmissionResponse,
+    Error,
+    { cid: string; an: number; gn: number; sn: number },
+    unknown
+> {
+    const queryClient = useQueryClient();
+
+    return useMutation({
+        mutationFn: async ({ cid, an, gn, sn }) => new SubmissionController(cid, an, gn).deleteSubmission(sn),
+        onSuccess: async (response) => {
+            if (!response.submission.group) {
+                await invalidateAllSubmissionKeys(queryClient);
+            } else {
+                const cls = response.submission.group.class;
+                const assignment = response.submission.group.assignment;
+
+                const cid = typeof cls === "string" ? cls : cls.id;
+                const an = typeof assignment === "number" ? assignment : assignment.id;
+                const gn = response.submission.group.groupNumber;
+
+                await invalidateAllSubmissionKeys(queryClient, cid, an, gn);
+            }
+        },
+    });
+}