I do not know if I am gifted or if I have ADHD. I have never been tested and my parents don't want me to be tested. I don't know what to do! My grades are getting lower and lower -- I had A's but now it's a miracle if I get a B. Also, English is not my native language.
Even if you do not have gifted testing, the upcoming PSAT, ACT, and SAT tests offered by your high school will give you an idea of your abilities. Do you have an English as a Second Language teacher in your school? If so, talk to this person or your guidance counselor about how to best prepare for these tests.
The problem with staying home from school is that it will not help your situation now or in the future, when colleges look at your record. I suggest that you meet with your guidance counselor and tell that person how you are bored. There may be some way you can get involved in some advanced coursework or extracurricular activities. Please don't ignore the homework or studying because it is boring. Lower grades do not show the school that you are capable of doing more interesting coursework.