I am a bad boy!!!!

i have been very bad lately. i am a higher decondary school student and i was not up to my standerds lately. my parents have lot of expectations in me i know that, initially i was never good at studying,seeing how sad my parents become when i score low marks, i worked extremely hard last year and for my luck some how question paper was just what i studied and i scored great marks, i really mean great marks. But what happend was the teachers and parents thought that i am very good at it and it's just i am lazy.

But now i can't tell them the truth there is no way that i can keepup to last years standard. it was a lucky charm last year.oh! anyone please help me