This video walks through examples of adding rationals, subtracting rationals, and simplifying complex fractions. This video is made using smart software, but is viewed by windows media player. These videos are helpful for students who were absent for the lesson, like to preview the material, or need to hear the material a second time. I have used them in my classroom by having the students watch and take notes at night and then complete the "homework" during class time. I have had such great success with this method and great reviews from the students and parents.