CK-12 Foundation
Addition of Integers: Polka Dots
What happens when you add negative and positive integers to one another? Do you add or subtract, and will the answer be positive or negative? Young mathematicians use blue and red polka dots to determine the value of an expression that...
University of Victoria
Introduction to Adjective Order
Here is an online teaching tool that you can use to help fourth graders understand the proper ordering of adjectives. An explanation is given for eight different types of adjectives in addition to guidelines about how to order them. This...
Curated OER
Solving Linear Equations
In this solving linear equations worksheet, 9th graders solve and complete 6 different types of problems. First, they maintain a balance on both sides of the equation so that each side remains equal. Then, students apply mathematical...