This is my personal opinion, I find Dot Point Physics to be unnecessarily long. For goodness sake it's 400 pages long. You don't need to complete every exercise in the book to master Physics. Most of the exercises are short answer, recall or straight calculation. There are very few really tough extended response questions in the book, like the 7 or 8 mark questions. Your teacher should set you selected problems from the book to help you consolidate your learning, but don't try to wade through the entire book. In my opinion that would be a waste of time.