Is this a rigorous curriculum enough for Harvard and Stanford ?

It depends. Because your not in all AP's, if your harvard/stanford bound you need to be getting high A's in all your cles. You should take the SAT II for Bio, AP US and Chem becasue those are your three honors courses. Unless you are getting all high a's, and have alot of sports/extra curiccular activities then this isnt top school material. if you have lke a 3.9 and get a good grade on SAT's and AP's then you will go to a good score. If you really want to get into those schools, you should try to take AP American Literature. This is a pretty good schedule, keep high A's and you definitley will have a shot