<p>I've seen two, so far, for Campbell's Biology book:
<a href="http://www.amazon.com/gp/product/0805371842/sr=1-1/qid=1146353701/ref=sr_1_1/102-5176483-5495319?%5Fencoding=UTF8&s=books%5B/url%5D">http://www.amazon.com/gp/product/0805371842/sr=1-1/qid=1146353701/ref=sr_1_1/102-5176483-5495319?%5Fencoding=UTF8&s=books</a>
and
<a href="http://www.amazon.com/gp/product/1933023015/ref=pd_sim_b_1/102-5176483-5495319?%5Fencoding=UTF8&v=glance&n=283155%5B/url%5D">http://www.amazon.com/gp/product/1933023015/ref=pd_sim_b_1/102-5176483-5495319?%5Fencoding=UTF8&v=glance&n=283155</a>
Are they worth the money and do they really help? How about the ones for other books, like chemistry, physics, etc.?
Are there certain subjects where you find study guides or word banks or supplementary materials especially helpful?</p>
<p>I like to get any sort of workbook that has practice test questions, as it saves me the problem of making up my own. They are worth it. Outlines aren't, but pictorial diagrams usually are.</p>
<p>If you need a supplement to Calculus, get the Calc for Dummies book.</p>
<p>We've used Campbell's in both of my bio classes so far. I don't have the study guide and I've been doing fine without it...it was optional so I never bothered to buy it.</p>
<p>I used the Campbell workbook for my AP Bio class. It wasn't required (or even suggested), but I found it a really great way to study. I didn't use it again for my first college bio class but that was because we used the Campbell book again, and I pretty much had the book memorized from AP. It depends on how you study as to whether it's a good thing to have or not. I liked having the questions based on the chapters. It sort of reinforced what the main points were in a way that made me think about them. But if you're someone who studies best by reading and re-reading chapters and notes (and I've done that in a lot of my classes, too), then the workbook probably isn't necessary.</p>