ok... i have some questions.Now im an exchange student(in grade 10) and im deciding about what grade im gonna be when i back thailand.I interest in this job so, anybody know i should back thailand and study grade 10 again or pass to grade 11 ! ps.i want to get in มหิดล

ps2. my school in thailand is Suankularb wittayarai in sci-math.

thank you for suggestion