Whenever you are working have a syllabus beside you, if you don't have one get it off the internet or ask your teacher to make copies for the whole class.
Project Work is important as little bits and pieces of it come up all over the subjects and there is a question on it
That group assignment was probably your teacher covering PW however at my school we did a project in yr11 and again in yr12, the improvement in work was very high as people lacked to comprehend some of the stuff first time through. What I think alot of teachers don't do is teach PW from a book aswell as the project and that's a mistake, so that's what you should do, it's a small chapter anyway.
I've attached my "summary" of a book (can't remember), perhaps once you see the topics and such you'll realise if you've done it or not.