Better Lesson
Better Lesson: Compare Parts of a Whole
Given a set of fractions students will be able to compare unit fractions by using models to determine that the more equal parts there are in the whole, the smaller each part will be. This instructional activity includes a detailed plan,...
Khan Academy
Khan Academy: Compare Multi Digit Numbers Word Problems
Solve word problems by comparing whole numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Homeschool Math
Homeschool Math: Lines, Rays, and Angles
This fourth-grade geometry lesson teaches the definitions for a line, ray, angle, acute angle, right angle, and obtuse angle. We also study how the size of the angle is ONLY determined by how much it has "opened" as compared to the whole...
PBS
Pbs: The Lowdown: Rot and Rubbish: The Rancid Truth About How Much Food We Waste
Explore the math of worldwide food waste, with focus on percentage, in this infographic from KQED. In the accompanying classroom activity, students predict the percent of food in each of the various categories (e.g., grains, fruit, etc.)...