some acid/base websites
I have located the following websites which may provide some assistance to you. Note: some may be beyond high school level, to some extent, but offer good help up to a point.
http://www.chemtutor.com/xacid.htm
http://www.wwnorton.com/college/chemistry/gilbert/overview/ch16.htm
Another cool place is http://www.chem.ubc.ca/courseware/pH/index.html
A site with problems to work as well as answers is http://www2.ucdsb.on.ca/tiss/stretton/CHEM2/acidwk01.htm
A site with quizzes is http://chemunder.chemistry.ohio-state.edu/under/chemed/qbank/quiz/bank12.htm
Do yourself a favor. READ YOUR TEXTBOOK. This will definitely eliminate some of the whining that goes on in class from you when you say "I don't get it" or "This is so hard" before you even explore anything outside of class. Care enough about yourself to invest in your learning.