NOTE: A FREE, tiny, low-res version of this lesson is on my web site. Purchase the Video if you want a larger, high quality movie. Lesson 2 consists of providing you with a Self-Tutorial on the basics of equalities and inequalities. The tutor goes over how to write results in interval notation, inequality notation, and set (set-builder) notation. He also explains in the printed notes (available for FREE on his web site) how to use your graphing calculator to help you make comparisons between numbers. Unfortunately, when these videos were made, I used a cheap wireless microphone, so you will hear an occasional "pop" and "buzz" sound when I am talking. I am sorry about this. The disc is not damaged. I have a new microphone now, so new lessons will be of a much higher quality. z575z