Assessment has not been a problem for me in my classroom. We have to keep a portfolio for each student and the Investigations program has made this very easy. I take a work sample from the students at the beginning of each unit and then again at the end. The students in my room love to see their own work. I enjoy seeing the progress they make from the beginning to the end. I like how the students need to show their work and explain what they are doing. This helps me to get a true understanding of what my students knowlege base is. I am really excitied to see the student's progress through the year. I was concerned about the amount of writing the students needed to do, but it has worked out wonderfully. They are able to verbally tell me what their illustrations mean and are now able to write short sentences to explain their reasoning.