Taking this in a month or so... I've passed the biology and chemistry tests, so I know the general format and all that, and I've been teaching (among other things) physical science (which is half physics) for 5 years now so I WAS fairly confident about it. I recently purchased the "General science" study guide from ETS and was taking a look at the physics section tonight. When I downloaded the sample questions from the ETS website, I got 18/20 of them on the first try. When I went through the book tonight, I thought I'd give those first 20 a shot. I was relatively confident about my answers and I missed EVERY SINGLE ONE! How is it that the practice questions from the ETS website and the practice questions in the ETS book are so different in difficulty even though they're written by the same people? The thing that's really killing me is all the equations you have to remember. I didn't even really use them in the downloaded questions but that's all the book is... For anyone else who's used the book, is it purposely written harder than what the test is in order to "over prepare" you? When I took my chem test, all I used to study from was "Chemistry for dummies" and I scored high on it... I'm beginning to think I can't pull that off with this one!