Interactive
National Council of Teachers of Mathematics

The Math Forum: "Make One" Operations W Fractions Game

For Students 9th - 10th Standards
This card game will help students review the basic operations with fractions. The materials needed, the rules of the game, and several follow-up activities are provided here for the teacher as a lesson plan.
Unit Plan
Khan Academy

Khan Academy: Negative Number Addition and Subtraction: Word Problems

For Students 6th - 8th Standards
Practice solving word problems with negative numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unit Plan
Khan Academy

Khan Academy: Interpreting Negative Number Statements

For Students 6th - 8th Standards
Practice matching addition and subtraction equations to real-world scenarios. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.