I'm 22 years old, and I can't even count the times the information in this book would have been useful to me in the past. Hell, I just started reading it and I'm already using these techniques to prepare for standardized tests. Any science or math student should commit these techniques to heart. I honestly believe they should be a required part of elementary school curriculum and the only reason I can think of why they aren't already is that teachers don't know of them! This book is worth a hundred times the price it costs for the value of the skills it will give you. Buy it!