app/Models/Lesson.php

@@ -4,6 +4,7 @@ namespace App\Models;
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
 
 class Lesson extends Model
 {
@@ -14,4 +15,9 @@ class Lesson extends Model
         'type',
         'lesson_date',
     ];
+
+    public function scores(): HasMany
+    {
+        return $this->hasMany(Score::class);
+    }
 }

app/Models/Score.php

@@ -3,9 +3,15 @@
 namespace App\Models;
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\Pivot;
 
 class Score extends Pivot
 {
     use HasFactory;
+
+    public function lesson(): BelongsTo
+    {
+        return $this->belongsTo(Lesson::class);
+    }
 }

app/Models/Student.php

@@ -34,7 +34,7 @@ class Student extends Model
 
     public function subjects(): BelongsToMany
     {
-        return $this->belongsToMany(Subject::class)->using(Score::class);
+        return $this->belongsToMany(Subject::class)->withPivot('mark')->using(Score::class);
     }
 
     public function scopeFilter(Builder $query): void