What is the difference between public schools and chartered schools?

Additionally all students may apply for admission to matriculation which is a one or two-year programme run by the Ministry of Education. Previously, it was a one-year programme, but beginning 2006, 30% of all matriculation students were offered two-year programmes. Not all applicants for matriculation are admitted and the selection criteria are not publicly declared, which has led to speculation that any criteria existing may not be adhered to. A race-based quota is applied on the admission process, with 90% of the places being reserved for the bumiputeras, and the other 10% for the non-bumiputeras. The matriculation programme is not as rigorous as the STPM. The matriculation programme has come under some criticism as it is the general consensus that this programme is much easier than the sixth form programme leading to the STPM and serves to help Bumiputeras enter the public university easily. It is considered easier because in the matriculation program the teachers set and mark the final exams that their students sit, whereas in the STPM the final exam is standardised and exam papers are exchanged between schools in different states to ensure unbiased marking.