Secondary education lasts for five years, referred to as Form ("Tingkatan") 1 to 5. Form 1 to Form 3 are known as Lower Secondary ("Menengah Rendah"), while Form 4 and 5 are known as Upper Secondary ("Menengah Atas"). Most students who had completed primary education are admitted to Form 1. Students from national-type primary schools have the additional requirement to obtain a minimum D grade for the Malay subjects in UPSR, failing which they will have to attend a year-long transition class, commonly called "Remove" ("Kelas/Tingkatan Peralihan"), before proceeding to Form 1. As in primary schools, students are promoted to the next year regardless of their academic performance.