问Laravel视图错误

EN

public function index()
{
   $students = Student::all()->toArray();
   return view('student.index', compact('students'));   
}

/**
 * Show the form for creating a new resource.
 *
 * @return \Illuminate\Http\Response
 */
public function create()
{
    return view('student.create');//
}

/**
 * Store a newly created resource in storage.
 *
 * @param  \Illuminate\Http\Request  $request
 * @return \Illuminate\Http\Response
 */
public function store(Request $request)
{
    $this->validate($request, [
        'first_name'            => 'required',
        'last_name'             => 'required',
        'Age'                   => 'required',
        'Address'               => 'required',
        'Grade_Level'           => 'required',
        'mothers_first_name'    => 'required',
        'mothers_last_name'     => 'required',
        'mothers_age'           => 'required',
        'fathers_first_name'    => 'required',
        'fathers_last_name'     => 'required',
        'fathers_age'           => 'required'
    ]);

    $student = new Student([
        'first_name'            => $request->get('first_name'),
        'last_name'             => $request->get('last_name'),
        'Age'                   => $request->get('Age'),
        'Address'               => $request->get('Address'),
        'Grade_Level'           => $request->get('Grade_Level'),
        'mothers_first_name'    => $request->get('mothers_first_name'),
        'mothers_last_name'     => $request->get('mothers_last_name'),
        'mothers_age'           => $request->get('mothers_age'),
        'fathers_first_name'    => $request->get('fathers_first_name'),
        'fathers_last_name'     => $request->get('fathers_last_name'),
        'fathers_age'           => $request->get('fathers_age')

    ]);
    $student->save();
    return redirect()->route('student.index')->with('success', 'New teacher data successfully added');
}

/**
 * Display the specified resource.
 *
 * @param  int  $id
 * @return \Illuminate\Http\Response
 */
public function show($id)
{
    //
}

/**
 * Show the form for editing the specified resource.
 *
 * @param  int  $id
 * @return \Illuminate\Http\Response
 */
public function edit($id)
{

    $student = Student::find($id);
    return view('student.edit', compact('student', 'id'));
}

/**
 * Update the specified resource in storage.
 *
 * @param  \Illuminate\Http\Request  $request
 * @param  int  $id
 * @return \Illuminate\Http\Response
 */
public function update(Request $request, $id)
{
    $this->validate($request, [
        'first_name'            =>  'required',
        'last_name'             =>  'required',
        'Age'                   =>  'required',
        'Address'               =>  'required',
        'Grade_Level'           =>  'required'
    ]);

    $student = Student::find($id);
    $student->first_name        = $request->get('first_name');
    $student->last_name         = $request->get('last_name');
    $student->Age               = $request->get('Age');
    $student->Address           = $request->get('Address');
    $student->Grade_Level       = $request->get('Grade_Level');
    $student->save();
    return redirect()->route('student.index')->with('success', 'Student data successfully updated');
}

/**
 * Remove the specified resource from storage.
 *
 * @param  int  $id
 * @return \Illuminate\Http\Response
 */
public function destroy($id)
{
   $student = Student::find($id);
   $student->delete();
   return redirect()->route('student.index')->with('success', 'Data successfully deleted');
}

<div class="container student-create">
 <div class="students-info">
	<h3>Student's Personal Info</h3>
	<form method="post" action="{{url('student')}}">
		{{csrf_field()}}
		<div class="form-group">
			<div class="col-sm">
		      <label for="Inputfirstname">First Name</label>
		      <input type="text" class="form-control" name="first_name" placeholder="Enter First Name">
		    </div>
		    <div class="col-sm">
		      <label for="Inputlastname">Last Name</label>
		      <input type="text" class="form-control" name="last_name" placeholder="Enter Last Name">
		    </div>
		    <div class="col-sm">
		      <label for="Inputlastname">Age</label>
		      <input type="number" class="form-control" name="Age" placeholder="Enter Last Name">
		    </div>
		</div>
		<div class="form-group">
			<div class="col-sm">
				<label for="InputAddress">Address</label>
				<input type="text" class="form-control" name="Address" placeholder="Enter Address">
			</div>
			<div class="col-sm">
				<label for="InputAddress">Grade Level/College Level</label>
				<select class="custom-select" name="Grade_Level">
			      <option selected="">Select Grade Level</option>
			      <option>Day Care 1</option>
			      <option>Day Care 2</option>
			      <option>Kinder Garten 1</option>
			      <option>Kinder Garten 2</option>
			      <option>Elementary 1</option>
			      <option>Elementary 2</option>
			      <option>Elementary 3</option>
			      <option>Elementary 4</option>
			      <option>Elementary 5</option>
			      <option>Elementary 6</option>
			      <option>Junior Highschool 1</option>
			      <option>Junior Highschool 2</option>
			      <option>Junior Highschool 3</option>
			      <option>Junior Highschool 4</option>
			      <option>Senior Highschool 1</option>
			      <option>Senior Highschool 2</option>
			      <option>College Level Information Technology 1</option>
			      <option>College Level Information Technology 2</option>
			      <option>College Level Information Technology 3</option>
			      <option>College Level Information Technology 4</option>
			    </select>
			</div>
		</div>

		<h3>Student's Parents Info</h3>
		<div class="form-group">
			<div class="col-sm">
		      <label for="Inputfirstname">Mothers First Name</label>
		      <input type="text" class="form-control" name="mothers_first_name" placeholder="Enter First Name">
		    </div>
		    <div class="col-sm">
		      <label for="Inputfirstname">Mothers Last Name</label>
		      <input type="text" class="form-control" name="mothers_last_name" placeholder="Enter Last Name">
		    </div>
		    <div class="col-sm">
		      <label for="Inputfirstname">Mothers Age</label>
		      <input type="number" class="form-control" name="mothers_age" placeholder="Enter Age">
		    </div>
		</div>
		<div class="form-group">
			<div class="col-sm">
			  <label for="Inputfirstname">Fathers First Name</label>
		      <input type="text" class="form-control" name="fathers_first_name" placeholder="Enter First Name">
			</div>
			<div class="col-sm">
			  <label for="Inputfirstname">Fathers Last Name</label>
		      <input type="text" class="form-control" name="fathers_last_name" placeholder="Enter Last Name">
			</div>
			<div class="col-sm">
			  <label for="Inputfirstname">Fathers Age</label>
		      <input type="number" class="form-control" name="fathers_age" placeholder="Enter Age">
			</div>
		</div>
		<div class="form-group submit">
		    <button type="button submit" class="btn btn-success">
		    		<i class="fas fa-check"></i> Submit Data
		    </button>
		</div>
	</form>
</div>