I have trouble in school need your advice please help.?

OK so i am 15/16 the school year has just ended. 2 years ago wen i was in grad 8 i was in public school i am kind of slow wen it comes to like math and (spelling if u cant all ready tell. so they put me in the math class for the kids who are slower. i have no problem making freinds, right now i am home schooled but have lots of freinds and they all want me to go to public school with them for grad 10 but i am worried i will look like a dummy and they will think i am weird if i start going i to all the (special) classics. my girl friend says she can help me out with like school work and all and i want to go back to school this year so i can play foot ball i can only play if i am in high school but enny ways i don't want to look like a dummy. and i think i will try hard to keep up