diff --git a/app/Http/Controllers/Admin/QuizController.php b/app/Http/Controllers/Admin/QuizController.php
index a612700..3015099 100644
--- a/app/Http/Controllers/Admin/QuizController.php
+++ b/app/Http/Controllers/Admin/QuizController.php
@@ -27,23 +27,23 @@ class QuizController extends Controller
 
     public function store(Request $request)
     {
+        // 1. Validate only the text and number fields
         $validated = $request->validate([
             'title' => 'required|string|max:255',
             'category_id' => 'required|exists:quiz_categories,id',
             'year' => 'nullable|integer',
             'type' => 'required|in:multiple_choice,descriptive,mixed',
             'duration_minutes' => 'required|integer|min:1',
-            'has_negative_score' => 'boolean',
-            'is_free' => 'boolean',
-            'is_published' => 'boolean',
             'description' => 'nullable|string',
         ]);
 
-        $validated['slug'] = Str::slug($validated['title']) . '-' . time();
+        // 2. Safely handle checkboxes and generate slug
+        $validated['slug'] = \Illuminate\Support\Str::slug($validated['title']) . '-' . time();
         $validated['has_negative_score'] = $request->has('has_negative_score');
         $validated['is_free'] = $request->has('is_free');
         $validated['is_published'] = $request->has('is_published');
 
+        // 3. Create the quiz
         $quiz = Quiz::create($validated);
 
         return redirect()->route('quizzes.questions.index', $quiz->id)
diff --git a/resources/views/admin/quizzes/create.blade.php b/resources/views/admin/quizzes/create.blade.php
index 60c2252..327d7ad 100644
--- a/resources/views/admin/quizzes/create.blade.php
+++ b/resources/views/admin/quizzes/create.blade.php
@@ -1,80 +1,94 @@
 @extends('admin.layouts.app')
 
 @section('content')
-    <div class="card">
-        <div class="card-header bg-primary text-white">
-            <h5 class="mb-0 text-white">تعریف آزمون جدید</h5>
-        </div>
-        <div class="card-body">
-            <form action="{{ route('quizzes.store') }}" method="POST">
-                @csrf
-                <div class="row g-3">
-                    <div class="col-md-6">
-                        <label class="form-label">عنوان آزمون <span class="text-danger">*</span></label>
-                        <input type="text" name="title" class="form-control" placeholder="مثلاً: آزمون وکالت کانون وکلا سال ۱۴۰۲" required>
-                    </div>
+<div class="card">
+    <div class="card-header bg-primary text-white">
+        <h5 class="mb-0 text-white">تعریف آزمون جدید</h5>
+    </div>
+    <div class="card-body">
+        
+        <!-- Display Validation Errors if any -->
+        @if ($errors->any())
+            <div class="alert alert-danger">
+                <ul class="mb-0">
+                    @foreach ($errors->all() as $error)
+                        <li>{{ $error }}</li>
+                    @endforeach
+                </ul>
+            </div>
+        @endif
 
-                    <div class="col-md-6">
-                        <label class="form-label">دسته‌بندی <span class="text-danger">*</span></label>
-                        <select name="category_id" class="form-select" required>
-                            <option value="">انتخاب کنید...</option>
-                            @foreach($categories as $category)
-                                <option value="{{ $category->id }}">{{ $category->title }}</option>
-                            @endforeach
-                        </select>
-                    </div>
+        <form action="{{ route('quizzes.store') }}" method="POST">
+            @csrf
+            <div class="row g-3">
+                <div class="col-md-6">
+                    <label class="form-label">عنوان آزمون <span class="text-danger">*</span></label>
+                    <input type="text" name="title" class="form-control" value="{{ old('title') }}" placeholder="مثلاً: آزمون وکالت کانون وکلا سال ۱۴۰۲" required>
+                </div>
 
-                    <div class="col-md-4">
-                        <label class="form-label">سال برگزاری</label>
-                        <input type="number" name="year" class="form-control" placeholder="1402">
-                    </div>
+                <div class="col-md-6">
+                    <label class="form-label">دسته‌بندی <span class="text-danger">*</span></label>
+                    <select name="category_id" class="form-select" required>
+                        <option value="">انتخاب کنید...</option>
+                        @foreach($categories as $category)
+                            <option value="{{ $category->id }}" {{ old('category_id') == $category->id ? 'selected' : '' }}>
+                                {{ $category->title }}
+                            </option>
+                        @endforeach
+                    </select>
+                </div>
 
-                    <div class="col-md-4">
-                        <label class="form-label">نوع سوالات <span class="text-danger">*</span></label>
-                        <select name="type" class="form-select" required>
-                            <option value="multiple_choice">چهار گزینه‌ای (تستی)</option>
-                            <option value="descriptive">تشریحی</option>
-                            <option value="mixed">ترکیبی</option>
-                        </select>
-                    </div>
+                <div class="col-md-4">
+                    <label class="form-label">سال برگزاری</label>
+                    <input type="number" name="year" class="form-control" value="{{ old('year') }}" placeholder="1402">
+                </div>
 
-                    <div class="col-md-4">
-                        <label class="form-label">مدت زمان (دقیقه)</label>
-                        <input type="number" name="duration_minutes" class="form-control" value="60" required>
-                    </div>
+                <div class="col-md-4">
+                    <label class="form-label">نوع سوالات <span class="text-danger">*</span></label>
+                    <select name="type" class="form-select" required>
+                        <option value="multiple_choice" {{ old('type') == 'multiple_choice' ? 'selected' : '' }}>چهار گزینه‌ای (تستی)</option>
+                        <option value="descriptive" {{ old('type') == 'descriptive' ? 'selected' : '' }}>تشریحی</option>
+                        <option value="mixed" {{ old('type') == 'mixed' ? 'selected' : '' }}>ترکیبی</option>
+                    </select>
+                </div>
 
-                    <div class="col-md-12">
-                        <label class="form-label">توضیحات آزمون</label>
-                        <textarea name="description" class="form-control" rows="3" placeholder="توضیحات و راهنمای شرکت در آزمون..."></textarea>
-                    </div>
+                <div class="col-md-4">
+                    <label class="form-label">مدت زمان (دقیقه)</label>
+                    <input type="number" name="duration_minutes" class="form-control" value="{{ old('duration_minutes', 60) }}" required>
+                </div>
 
-                    <div class="col-md-4">
-                        <div class="form-check mt-3">
-                            <input class="form-check-input" type="checkbox" name="has_negative_score" id="negScore" checked>
-                            <label class="form-check-label" for="negScore">محاسبه نمره منفی (برای تستی)</label>
-                        </div>
-                    </div>
+                <div class="col-md-12">
+                    <label class="form-label">توضیحات آزمون</label>
+                    <textarea name="description" class="form-control" rows="3" placeholder="توضیحات و راهنمای شرکت در آزمون...">{{ old('description') }}</textarea>
+                </div>
 
-                    <div class="col-md-4">
-                        <div class="form-check mt-3">
-                            <input class="form-check-input" type="checkbox" name="is_free" id="isFree">
-                            <label class="form-check-label" for="isFree">آزمون رایگان است (بدون نیاز به اشتراک)</label>
-                        </div>
-                    </div>
-
-                    <div class="col-md-4">
-                        <div class="form-check mt-3">
-                            <input class="form-check-input" type="checkbox" name="is_published" id="isPub" checked>
-                            <label class="form-check-label" for="isPub">انتشار فوری روی اپلیکیشن</label>
-                        </div>
-                    </div>
-
-                    <div class="col-12 mt-4 text-end">
-                        <a href="{{ route('quizzes.index') }}" class="btn btn-light me-2">انصراف</a>
-                        <button type="submit" class="btn btn-success">ثبت و ورود به مرحله ثبت سوالات</button>
+                <div class="col-md-4">
+                    <div class="form-check mt-3">
+                        <input class="form-check-input" type="checkbox" name="has_negative_score" id="negScore" {{ old('has_negative_score', true) ? 'checked' : '' }}>
+                        <label class="form-check-label" for="negScore">محاسبه نمره منفی (برای تستی)</label>
                     </div>
                 </div>
-            </form>
-        </div>
+
+                <div class="col-md-4">
+                    <div class="form-check mt-3">
+                        <input class="form-check-input" type="checkbox" name="is_free" id="isFree" {{ old('is_free') ? 'checked' : '' }}>
+                        <label class="form-check-label" for="isFree">آزمون رایگان است (بدون نیاز به اشتراک)</label>
+                    </div>
+                </div>
+
+                <div class="col-md-4">
+                    <div class="form-check mt-3">
+                        <input class="form-check-input" type="checkbox" name="is_published" id="isPub" {{ old('is_published', true) ? 'checked' : '' }}>
+                        <label class="form-check-label" for="isPub">انتشار فوری روی اپلیکیشن</label>
+                    </div>
+                </div>
+
+                <div class="col-12 mt-4 text-end">
+                    <a href="{{ route('quizzes.index') }}" class="btn btn-light me-2">انصراف</a>
+                    <button type="submit" class="btn btn-success">ثبت و ورود به مرحله ثبت سوالات</button>
+                </div>
+            </div>
+        </form>
     </div>
-@endsection
+</div>
+@endsection
\ No newline at end of file