I'm going into 8th grade and I got into geometry. Last year I had a HORRIBLE algebra teacher, so I only got an 87% in the class. I found out I'm going to have the same teacher because of the dang budget cuts, so I want to start geometry before school goes into session. Are there any websites with free geometry introductions? Maybe even an online textbook? Or, are there any geometry workbooks that DON'T have the answers right after the question? (I went to B&N and that's all I found -- workbooks where you circle the answer and then you see the correct one directly below it.)

thanks in advance!

Please don't suggest anything that costs over $20 or a website that ships textbooks. thanks :)