Adding Integers 

The tutorial shows how to add 2 integers through several examples. The first about 4:30 discusses with 5 examples how to add two integers with the same sign and from 4:30 to the end shows examples when you are adding one positive and one negative integer. The first 13 minutes (approximately) shows using a number line how to model add integers. The last 4 minutes demonstrates how to use integer tiles to model adding a positive and a negative integer.