At the beginning of the session, I told Matthew to draw a complete sketch of the last problem we had discussed yesterday and to use one of the examples in the text to add as much detail as necessary to solve the probem. He drew a much more complete sketch than he had previously drawn and included some correct labeling. I showed him my sketch and explained the extra information that was required, including the small force triangle. I then showed him how the information led to solving the problem. I assigned Matthew homework to read p.99 - 113.