if (isset($_REQUEST["id"])) {
            $id = $_REQUEST["id"];
        }
        $aulasBLL->delete($id);
        break;
    case "eliminar-materia":
        if (isset($_REQUEST["id"])) {
            $id = $_REQUEST["id"];
        }
        $materiasBLL->delete($id);
        break;
    case "eliminar-registro":
        if (isset($_REQUEST["id"])) {
            $id = $_REQUEST["id"];
        }
        $registrosBLL->delete($id);
        break;
}
?>
<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <link rel="stylesheet" type="text/css" href="css/index.css">
        <title></title>
    </head>
    <body>
    <main>
        <span>Aulas</span>
        <button> <a class="link" href="InsertarAula.php">Registrar Aula</a> </button>
        <table>