Instruct: Classify the given review into positive or negative sentiment.
Query: Dissapointing

Perhaps the most fascinating feature of this book is the order in which topics are presented. Students flit all the way through triangles, angles and intersecting lines before they learn that theorems and postulates have some importance. They go through half of the book (and presumably through half of the school year) before they encounter the concept of a mathematical proof. In fact, they already have been required to learn some proofs, but the book hasn't told them that this is what they are doing.