why does this happen!!!

SIGH. NOt a good start but its bad enough. A maths is already confusing enough-and its the second day! haiya haiya..what if i cant catch up with the class? and then i have to rush to try and understand the concept... and while iam trying to understand it the teacher has already gone on!! then if i dont understand this 2nd question i'll have to relook at it and by then the teacher would have gone 3 qns ahead! argh my worst nightmare comes through again... nooooooooo i hope this doesnt happen pls pls!!!!!!!!!!