Theatrical music brings the Lesson 10 instructional videos to life with an enchanting fairy tale theme. Students apply the previously learned Nines trick to larger facts with Nine as an addend. The Fast Facts video develops automaticity with all Addition facts in this group. Use the Subtraction video to connect all of this lesson’s focus facts to their Subtraction counterparts! Click screens to PLAY. Download free video player. (You most likely already have one installed!)