Malay Language Problems Facing by Teachers

Guru Bahasa Melayu are just not facing problems in the classroom while learning and teaching session. We are sensitive about penggunaan bahasa Melayu yang betul or the correct Malay language users. In the classroom, pupils learned about how to use or writting bahasa in a right manners just like using the adverb, adjective, conjunstion and so on. Unfortunately, our strive to bring pupils for mastering bahasa correctly sometimes to be take aside. Teachers, not only guru bahasa, including the other subject teachers  should sensitive or taking more awarenness about the incorrect using bahasa. For instance, the word mempercepatkan  (rapidly or something to be faster) are incorrect because by using imbuhan memper... kan for adjective word are not allow. The book Tatabahasa Dewan DBP called 'lewah' or overflow just like water in the tank. That's mean mempercepatkan should be write 'mempercepat' or 'mencepatkan" only. These in a fact that, our pupils who studying bahasa sustains weakness in their test or examination caused by subject teachers likes science, mathematics, etc taking lightly about that spelling. How long this problem will be solved ?