Resource to supplement physics I being taught through "Spiral Physics" I just started Physics I this semester. Though our instructor has given a ton of downloadable PDF files to supplement our textbook, it is all information to read through and study. He has given us absolutely no practice questions that include answers. The textbook, "Spiral Physics," an online/PDF textbook resource has practice questions in it, but it has none of the answers from what I've seen so far. I'm wondering if anyone is familiar with the structure of Spiral Physics and might know of any supplemental resources I can use in conjunction with it that will give me practice questions and answers? An online resource or PDF textbook would be great, as I am strapped for cash until I receive my financial aid in October. Thanks.