The document provides information about Module 1, Lesson 21 which took place on October 20, 2014. It informs students that homework number 5 is due the next day and that exam 2 will be on Friday October 24. It includes a table for students to complete as part of the "Do Now" activity. The closing questions ask students to consider how to produce a scale drawing at a different scale than the original and how to determine the scale factor between the new and original drawings.