CourseWork/app/Services/ScoreService.php

<?php

namespace App\Services;

use App\Models\Lesson;

class ScoreService
{
    public function update(Lesson $lesson, array $data)
    {
        $lesson->students->each(function ($item, $key) use ($data, $lesson) {
            if ($data['score' . $item->id]) {
                $lesson->students()->syncWithoutDetaching([$item->id => ['score' => $data['score' . $item->id]]]);
            }
        });

        return $lesson;
    }
}