Is IB for two years only?
3 subjects for SL and 3 subjects for HL, is the subjects for HL is learn in more depth than SL?
Btw, thanks for your suggestion.

IBDP means International Baccalaureate Diploma Programme.Other words internaional highschool diploma programme.
Its a 2 yr course .where student is asked to take 6 subject out of which english n math is compulsory the rest is divided in groups
Language,philosophy etc.student take 3 HL n 3SL .
apart from subject u also take EE extended essay where u choose a topic choose a question(make one by urslef) do a research on it say baout 40 hours of research n write an essayabout 4000 word.apart 4m that u also do ToK theory of Knowledge. and lastly CAS hours which is creativitry action n servie hours
n for more info u can go through the site Q80boy mentioned