Curated OER
Visualizing Multiplication
Upper graders represent multiplication of a two-digit number by a two-digit number as the area of a rectangle with dimensions of the two factors. They find patterns for the number of different base ten blocks in a rectangle representing...
Primary Resources
Long Multiplication
Multiplying two-digit numbers together can be confusing for many learners. This clear presentation does a good job of showing each of the steps, and explaining why the steps are taken, to young mathematicians. The presentation takes one...