Learn 9 x 2 = 18 to 9 x 9 = 81 with this echo -style song from Audio Memory's Multiplication Songs CD by Kathy Troxel.
An assessment test song is also available.
This is an mp3 of the Place Value Rap used in conjunction with my Place Value Rap and lesson plan. The rap helps students master the concept of place value up to the trillions place.