diff --git a/app/Filament/Resources/Learning/Assignments/Actions/MarkAsSentAction.php b/app/Filament/Resources/Learning/Assignments/Actions/MarkAsSentAction.php
index 7001077..0ed0b1a 100644
--- a/app/Filament/Resources/Learning/Assignments/Actions/MarkAsSentAction.php
+++ b/app/Filament/Resources/Learning/Assignments/Actions/MarkAsSentAction.php
@@ -25,7 +25,7 @@ protected function setUp(): void
             ->icon(function (array $arguments, ?Assignment $record) {
                 $assignment = $record ?? Assignment::find($arguments['record'] ?? null);
 
-                return $assignment?->is_sent_to_lecturer ? 'heroicon-o-lock-open' : 'heroicon-o-check-circle';
+                return $assignment?->is_sent_to_lecturer ? 'heroicon-o-lock-open' : 'heroicon-o-paper-airplane';
             })
             ->color(function (array $arguments, ?Assignment $record) {
                 $assignment = $record ?? Assignment::find($arguments['record'] ?? null);
diff --git a/app/Filament/Resources/Learning/Assignments/Pages/SubmissionDetailPage.php b/app/Filament/Resources/Learning/Assignments/Pages/SubmissionDetailPage.php
index d1c5c3a..b53994d 100644
--- a/app/Filament/Resources/Learning/Assignments/Pages/SubmissionDetailPage.php
+++ b/app/Filament/Resources/Learning/Assignments/Pages/SubmissionDetailPage.php
@@ -3,6 +3,7 @@
 namespace App\Filament\Resources\Learning\Assignments\Pages;
 
 use App\Enums\AssignmentType;
+use App\Enums\NotifStyle;
 use App\Filament\Actions\BackAction;
 use App\Filament\Resources\Learning\Assignments\Actions\MarkAsSentAction;
 use App\Filament\Resources\Learning\Assignments\AssignmentResource;
@@ -181,7 +182,7 @@ public function assignmentSummary(): array
     #[Computed]
     public function sectionIcon(): string
     {
-        return SystemNotification::getNotifStyle() === \App\Enums\NotifStyle::Cheerful
+        return SystemNotification::getNotifStyle() === NotifStyle::Cheerful
             ? 'heroicon-o-document-magnifying-glass'
             : 'heroicon-o-document-text';
     }
diff --git a/app/Filament/Resources/Learning/Attendances/Pages/ManageAttendances.php b/app/Filament/Resources/Learning/Attendances/Pages/ManageAttendances.php
index 4640ccc..f78b62c 100644
--- a/app/Filament/Resources/Learning/Attendances/Pages/ManageAttendances.php
+++ b/app/Filament/Resources/Learning/Attendances/Pages/ManageAttendances.php
@@ -99,7 +99,14 @@ public function getSchedules()
         }
 
         return ClassSession::query()
-            ->whereDate('date', now())
+            ->where(function ($query) use ($student) {
+                $query->whereDate('date', now())
+                    ->orWhere(function ($q) use ($student) {
+                        $q->whereDate('date', '<', now())
+                            ->where('is_sent_to_lecturer', false)
+                            ->whereDoesntHave('attendances', fn ($aq) => $aq->where('student_id', $student->id));
+                    });
+            })
             ->with(['course', 'attendances' => function ($q) use ($student) {
                 $q->where('student_id', $student->id);
             }])
@@ -114,10 +121,11 @@ public function scheduleCards()
             ->map(function ($schedule) {
                 $attendance = $schedule->attendances?->first();
                 $isAttended = $attendance !== null;
+                $isSent = $schedule->is_sent_to_lecturer;
 
                 $now = now();
                 $startTime = now()->setTimeFrom($schedule->start_time);
-                $canAttend = $now->greaterThanOrEqualTo($startTime);
+                $canAttend = $now->greaterThanOrEqualTo($startTime) && ! $isSent;
 
                 $statusLabel = 'Belum Presensi';
                 $statusColor = 'warning';
@@ -127,6 +135,10 @@ public function scheduleCards()
                     $statusLabel = 'Hadir';
                     $statusColor = 'success';
                     $statusIcon = 'heroicon-o-check-circle';
+                } elseif ($isSent) {
+                    $statusLabel = 'Terkirim';
+                    $statusColor = 'danger';
+                    $statusIcon = 'heroicon-o-paper-airplane';
                 } elseif (! $canAttend) {
                     $statusLabel = 'Belum Dimulai';
                     $statusColor = 'gray';
@@ -139,6 +151,7 @@ public function scheduleCards()
                     'lecturer_name' => $schedule->course?->lecturer ?? 'Belum Ditentukan',
                     'time_range' => $schedule->start_time?->format('H:i').' - '.$schedule->end_time?->format('H:i'),
                     'is_attended' => $isAttended,
+                    'is_sent_to_lecturer' => $isSent,
                     'can_attend' => $canAttend && ! $isAttended,
                     'status_label' => $statusLabel,
                     'status_color' => $statusColor,
@@ -210,6 +223,14 @@ public function attend(int $sessionId): void
             return;
         }
 
+        // Check session status
+        if ($session->is_sent_to_lecturer) {
+            SystemNotification::send('attendance_closed', type: 'danger')
+                ->send();
+
+            return;
+        }
+
         // Check time
         $startTime = $session->start_time;
         if (now()->lessThan($startTime)) {
diff --git a/app/Filament/Resources/Learning/ClassSessions/Actions/MarkAsSentAction.php b/app/Filament/Resources/Learning/ClassSessions/Actions/MarkAsSentAction.php
new file mode 100644
index 0000000..93b63ee
--- /dev/null
+++ b/app/Filament/Resources/Learning/ClassSessions/Actions/MarkAsSentAction.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace App\Filament\Resources\Learning\ClassSessions\Actions;
+
+use App\Filament\Support\SystemNotification;
+use App\Models\ClassSession;
+use Filament\Actions\Action;
+
+class MarkAsSentAction extends Action
+{
+    public static function getDefaultName(): ?string
+    {
+        return 'markAsSentAction';
+    }
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->label(function (array $arguments, ?ClassSession $record) {
+            $session = $record ?? ClassSession::find($arguments['record'] ?? null);
+
+            return $session?->is_sent_to_lecturer ? 'Buka Kunci' : 'Tandai Terkirim';
+        })
+            ->icon(function (array $arguments, ?ClassSession $record) {
+                $session = $record ?? ClassSession::find($arguments['record'] ?? null);
+
+                return $session?->is_sent_to_lecturer ? 'heroicon-o-lock-open' : 'heroicon-o-paper-airplane';
+            })
+            ->color(function (array $arguments, ?ClassSession $record) {
+                $session = $record ?? ClassSession::find($arguments['record'] ?? null);
+
+                return $session?->is_sent_to_lecturer ? 'warning' : 'success';
+            })
+            ->link()
+            ->visible(fn () => auth()->user()->hasRole(['Kosma', 'Developer']))
+            ->action(function (array $arguments, $livewire, ?ClassSession $record) {
+                $session = $record ?? ClassSession::find($arguments['record'] ?? null);
+
+                if (! $session) {
+                    return;
+                }
+
+                $session->update([
+                    'is_sent_to_lecturer' => ! $session->is_sent_to_lecturer,
+                ]);
+
+                SystemNotification::send($session->is_sent_to_lecturer ? 'session_sent' : 'session_unlocked')
+                    ->send();
+
+                if (isset($livewire->sessions)) {
+                    unset($livewire->sessions);
+                }
+            });
+    }
+}
diff --git a/app/Filament/Resources/Learning/ClassSessions/Pages/ListCourseSessions.php b/app/Filament/Resources/Learning/ClassSessions/Pages/ListCourseSessions.php
index 4ad186d..e91d960 100644
--- a/app/Filament/Resources/Learning/ClassSessions/Pages/ListCourseSessions.php
+++ b/app/Filament/Resources/Learning/ClassSessions/Pages/ListCourseSessions.php
@@ -6,6 +6,7 @@
 use App\Filament\Resources\Learning\ClassSessions\Actions\DeleteSessionAction;
 use App\Filament\Resources\Learning\ClassSessions\Actions\EditSessionAction;
 use App\Filament\Resources\Learning\ClassSessions\Actions\GenerateSessionsAction;
+use App\Filament\Resources\Learning\ClassSessions\Actions\MarkAsSentAction;
 use App\Filament\Resources\Learning\ClassSessions\Actions\ShareAttendanceAction;
 use App\Filament\Resources\Learning\ClassSessions\Actions\ViewAssignmentsAction;
 use App\Filament\Resources\Learning\ClassSessions\Actions\ViewAttendanceAction;
@@ -60,6 +61,7 @@ public function sessions(): Collection
                 'attendance_percentage' => $totalActiveStudents > 0 ? round(($session->attendances_count / $totalActiveStudents) * 100) : 0,
                 'materials_count' => $session->materials_count,
                 'assignments_count' => $session->assignments_count,
+                'is_sent_to_lecturer' => $session->is_sent_to_lecturer,
             ]);
     }
 
@@ -114,6 +116,11 @@ public function editSessionAction(): EditSessionAction
         return EditSessionAction::make();
     }
 
+    public function markAsSentAction(): MarkAsSentAction
+    {
+        return MarkAsSentAction::make();
+    }
+
     public function deleteSessionAction(): DeleteSessionAction
     {
         return DeleteSessionAction::make();
diff --git a/app/Filament/Resources/Learning/ClassSessions/Pages/ManageClassSessions.php b/app/Filament/Resources/Learning/ClassSessions/Pages/ManageClassSessions.php
index d4b2b45..443f89e 100644
--- a/app/Filament/Resources/Learning/ClassSessions/Pages/ManageClassSessions.php
+++ b/app/Filament/Resources/Learning/ClassSessions/Pages/ManageClassSessions.php
@@ -15,6 +15,7 @@
 use Filament\Forms\Contracts\HasForms;
 use Filament\Resources\Pages\Page;
 use Filament\Schemas\Schema;
+use Illuminate\Support\Arr;
 use Illuminate\Support\Collection;
 use Livewire\Attributes\Computed;
 
@@ -85,13 +86,21 @@ public function todaySessions(): Collection
                     'attendance_percentage' => $percentage,
                     'materials_count' => $session->materials_count,
                     'assignments_count' => $session->assignments_count,
+                    'is_sent_to_lecturer' => $session->is_sent_to_lecturer,
                     'url' => ClassSessionResource::getUrl('course', ['course' => $session->course]),
 
+                    // Pre-calculated classes
+                    'status_label' => $session->is_sent_to_lecturer ? 'Terkirim' : $session->time_range,
+                    'status_icon' => $session->is_sent_to_lecturer ? 'heroicon-s-paper-airplane' : 'heroicon-s-clock',
                     // Pre-calculated classes
                     'card_classes' => 'group flex w-full rounded-xl border border-primary-300 dark:border-primary-700 bg-primary-50/30 dark:bg-primary-900/10 shadow-sm overflow-hidden relative transition-all hover:shadow-md',
                     'session_badge_classes' => 'flex h-12 w-12 shrink-0 flex-col items-center justify-center rounded-lg font-bold border bg-primary-100 dark:bg-primary-800 text-primary-700 dark:text-primary-300 border-primary-200 dark:border-primary-700',
                     'title_classes' => 'font-bold transition-colors text-gray-900 dark:text-white group-hover:text-primary-600',
-                    'status_badge_classes' => 'flex items-center gap-1.5 rounded-full px-3 py-1 text-[11px] font-bold shadow-sm bg-primary-500 text-white animate-pulse',
+                    'status_badge_classes' => Arr::toCssClasses([
+                        'flex items-center gap-1.5 rounded-full px-3 py-1 text-[11px] font-bold shadow-sm text-white',
+                        'bg-primary-500 animate-pulse' => ! $session->is_sent_to_lecturer,
+                        'bg-danger-500' => $session->is_sent_to_lecturer,
+                    ]),
                     'attendance_section_classes' => 'flex flex-col items-center justify-center border-l border-primary-200 dark:border-primary-800 p-2 bg-white/30 dark:bg-black/10 transition-colors group-hover:bg-primary-500/5',
                 ];
             });
diff --git a/app/Models/ClassSession.php b/app/Models/ClassSession.php
index 6750f15..7361066 100644
--- a/app/Models/ClassSession.php
+++ b/app/Models/ClassSession.php
@@ -28,6 +28,7 @@ protected function casts(): array
             'end_time' => 'datetime',
             'session_number' => 'integer',
             'start_time' => 'datetime',
+            'is_sent_to_lecturer' => 'boolean',
         ];
     }
 
diff --git a/database/migrations/2026_04_07_094148_add_is_sent_to_lecturer_to_assignments_table.php b/database/migrations/2026_04_07_094148_add_is_sent_to_lecturer_to_assignments_table.php
index d4606d6..4eb40db 100644
--- a/database/migrations/2026_04_07_094148_add_is_sent_to_lecturer_to_assignments_table.php
+++ b/database/migrations/2026_04_07_094148_add_is_sent_to_lecturer_to_assignments_table.php
@@ -11,7 +11,7 @@
      */
     public function up(): void
     {
-        if (!Schema::hasColumn('assignments', 'is_sent_to_lecturer')) {
+        if (! Schema::hasColumn('assignments', 'is_sent_to_lecturer')) {
             Schema::table('assignments', function (Blueprint $table) {
                 $table->boolean('is_sent_to_lecturer')->default(false)->after('due_date');
             });
diff --git a/database/migrations/2026_04_07_102319_add_is_sent_to_lecturer_to_class_sessions_table.php b/database/migrations/2026_04_07_102319_add_is_sent_to_lecturer_to_class_sessions_table.php
new file mode 100644
index 0000000..aeb7b16
--- /dev/null
+++ b/database/migrations/2026_04_07_102319_add_is_sent_to_lecturer_to_class_sessions_table.php
@@ -0,0 +1,30 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        if (! Schema::hasColumn('class_sessions', 'is_sent_to_lecturer')) {
+            Schema::table('class_sessions', function (Blueprint $table) {
+                $table->boolean('is_sent_to_lecturer')->default(false)->after('end_time');
+            });
+        }
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('class_sessions', function (Blueprint $table) {
+            $table->dropColumn('is_sent_to_lecturer');
+        });
+    }
+};
diff --git a/lang/id/notif.php b/lang/id/notif.php
index 826b890..38a6193 100644
--- a/lang/id/notif.php
+++ b/lang/id/notif.php
@@ -157,6 +157,18 @@
             'title' => 'Tugas Terkunci! 🔒',
             'body' => 'Mohon maaf, tugas ini sudah ditandai terkirim ke dosen oleh Kosma dan tidak dapat diubah lagi. 🚫',
         ],
+        'session_sent' => [
+            'title' => 'Sesi Terkirim! 🚀✨',
+            'body' => 'Laporan presensi untuk sesi ini telah resmi ditandai terkirim ke dosen. Data aman tersimpan! ✅',
+        ],
+        'session_unlocked' => [
+            'title' => 'Kunci Presensi Dibuka! 🔓✨',
+            'body' => 'Mahasiswa sekarang bisa melakukan presensi kembali untuk sesi ini. 📝',
+        ],
+        'attendance_closed' => [
+            'title' => 'Yah, Presensi Sudah Tutup! 😭⌛',
+            'body' => 'Maaf ya, sesi presensi ini sudah ditutup oleh Kosma. Lain kali jangan sampai terlambat ya! 💪',
+        ],
 
         // UI Labels & Descriptions
         'labels' => [
@@ -461,6 +473,18 @@
             'title' => 'Akses Pengumpulan Ditutup',
             'body' => 'Tugas ini telah dalam status final (terkirim ke dosen). Perubahan data tidak lagi dimungkinkan.',
         ],
+        'session_sent' => [
+            'title' => 'Konfirmasi Pengiriman Laporan',
+            'body' => 'Laporan presensi sesi perkuliahan telah berhasil ditandai sebagai terkirim ke dosen pengampu.',
+        ],
+        'session_unlocked' => [
+            'title' => 'Kunci Akses Presensi Dibuka',
+            'body' => 'Otoritas presensi telah diaktifkan kembali. Seluruh mahasiswa terkait dapat melakukan pengisian data kehadiran.',
+        ],
+        'attendance_closed' => [
+            'title' => 'Akses Presensi Ditutup',
+            'body' => 'Sesi presensi untuk mata kuliah ini telah ditutup secara resmi. Anda tidak dapat melakukan pengisian data kehadiran lagi.',
+        ],
 
         // UI Labels & Descriptions
         'labels' => [
diff --git a/resources/views/filament/resources/learning/attendances/index.blade.php b/resources/views/filament/resources/learning/attendances/index.blade.php
index 96479be..e61fb57 100644
--- a/resources/views/filament/resources/learning/attendances/index.blade.php
+++ b/resources/views/filament/resources/learning/attendances/index.blade.php
@@ -89,6 +89,13 @@ class="text-[10px] font-bold text-primary-700 dark:text-primary-200 uppercase tr
                                             Selesai
                                         </span>
                                     </div>
+                                @elseif ($card->is_sent_to_lecturer)
+                                    <div class="px-2 py-1 flex items-center gap-1.5">
+                                        <x-heroicon-m-paper-airplane class="w-3 h-3 text-danger-500" />
+                                        <span
+                                            class="text-[10px] font-bold text-danger-500 uppercase tracking-widest leading-none italic">Sesi
+                                            Terkirim</span>
+                                    </div>
                                 @else
                                     <div class="px-2 py-1">
                                         <span
diff --git a/resources/views/filament/resources/learning/class-sessions/index.blade.php b/resources/views/filament/resources/learning/class-sessions/index.blade.php
index ca40441..c53be8a 100644
--- a/resources/views/filament/resources/learning/class-sessions/index.blade.php
+++ b/resources/views/filament/resources/learning/class-sessions/index.blade.php
@@ -34,8 +34,8 @@
                                 </div>
 
                                 <div class="{{ $session->status_badge_classes }} shrink-0 self-start">
-                                    <x-heroicon-s-clock class="w-3.5 h-3.5" />
-                                    {{ $session->time_range }}
+                                    <x-filament::icon :icon="$session->status_icon" class="w-3.5 h-3.5" />
+                                    {{ $session->status_label }}
                                 </div>
                             </div>
 
diff --git a/resources/views/filament/resources/learning/class-sessions/show.blade.php b/resources/views/filament/resources/learning/class-sessions/show.blade.php
index 4e7379b..cf41c96 100644
--- a/resources/views/filament/resources/learning/class-sessions/show.blade.php
+++ b/resources/views/filament/resources/learning/class-sessions/show.blade.php
@@ -27,7 +27,7 @@ class="flex flex-wrap items-center gap-x-4 gap-y-1 text-sm text-gray-500 dark:te
                                     </div>
                                 </div>
 
-                                <div class="flex items-center gap-2">
+                                 <div class="flex items-center gap-2">
                                     <div
                                         class="flex items-center gap-1.5 text-xs font-bold text-success-600 dark:text-success-400">
                                         <x-heroicon-o-user-group class="w-4 h-4 shrink-0" />
@@ -40,6 +40,12 @@ class="text-[10px] opacity-60">/{{ $session->total_students }}</span>
                                     </div>
                                     <span
                                         class="text-[10px] font-bold text-gray-500">{{ $session->attendance_percentage }}%</span>
+                                    
+                                    @if ($session->is_sent_to_lecturer)
+                                        <span class="inline-flex items-center rounded-md bg-danger-50 dark:bg-danger-500/10 px-1.5 py-0.5 text-[10px] font-bold text-danger-700 dark:text-danger-400 ring-1 ring-inset ring-danger-600/20">
+                                            Terkirim
+                                        </span>
+                                    @endif
                                 </div>
                             </div>
 
@@ -60,6 +66,7 @@ class="text-[10px] font-bold text-gray-500">{{ $session->attendance_percentage }
                         class="flex flex-wrap items-center gap-3 px-4 py-3 border-t border-gray-100 dark:border-gray-700">
                         {{ ($this->viewAttendanceAction)(['session' => $session->id]) }}
                         {{ ($this->shareAttendanceAction)(['session' => $session->id]) }}
+                        {{ ($this->markAsSentAction)(['record' => $session->id]) }}
                         {{ ($this->editSessionAction)(['session' => $session->id]) }}
                         {{ ($this->deleteSessionAction)(['session' => $session->id]) }}
                     </div>
diff --git a/tests/Feature/AssignmentTest.php b/tests/Feature/AssignmentTest.php
index 4def8a9..b06f7e3 100644
--- a/tests/Feature/AssignmentTest.php
+++ b/tests/Feature/AssignmentTest.php
@@ -433,4 +433,3 @@
             ->assertDontSeeHtml('type="file"');
     });
 });
-