<form action="tambah.php" method="POST">
    NIS <input type="text" name="nis"><br>
    Nama Lengkap <input type="text" name="nama_lengkap"><br>
    Jenis Kelamin<br>
    <input type="radio" name="jenis_kelamin" value="L"> Laki-Laki<br>
    <input type="radio" name="jenis_kelamin" value="P"> Perempuan<br>
    Kelas<br>
    <select name="kelas">
        <option value="XI-RPL1">XI-RPL1</option>
        <option value="XI-RPL2">XI-RPL2</option>
        <option value="XI-RPL3">XI-RPL3</option>
    </select><br>
    Jurusan <input type="text" name="jurusan"><br>
    <input type="submit" value="Simpan">
</form>