3 digit addition Grade 2
This video is made by grade 2 students who are explaining how to add 3 digit numbers by using a horizontal column method. Very interesting!

3 digit subtraction Grade 2
Instruction video on how to subtract 3 digit numbers using the place value methods. This video is made by a group of students.

Left to right subtraction Grade 3
This video explains a different way of subtraction. It explains how to start on the right side and work your way to the left. Very interesting!