Curated OER
Defining Division
Upper graders explore division through fair-shares. They will review fair shares and fractions as a segway into division. They start by playing "Share Fairly" game and create mathematical arguments for solving problems. Manipulatives and...
University of Saskatchewan (Canada)
University of Saskatchewan: Techniques for Proofs
The University of Saskatchewan's Department of Mathematics and Statistics provides high school students with online tutorials and exercises on what they deem some of the most important techniques for mathematical proofs: truth tables,...
OER Commons
Oer Commons: Mars: Proving the Pythagorean Theorem
This lesson is intended to help you assess how well students are able to produce and evaluate geometrical proofs. PowerPoint slides are included with the lesson.
University of Toronto (Canada)
Mathematically Interesting Games
Challenge the genius in you with these three mathematically interesting games recommended by the University of Toronto?s Mathematics Network. Your goal is to uncover winning strategies for each game and to mathematically ?prove? that...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Deductive Reasoning
An explanation and description of deductive reasoning in solving problems at this site from The Math Forum. Simple and helpful information.
TED Talks
Ted: Ted Ed: How to Prove a Mathematical Theory
Explore mathematical proofs and how they are used in our everyday life with this animated video. [4:39]
Education Development Center
Making Mathematics: Proof
This is a site which links to specific techniques of proving including conditional statements, proof by contradiction, mathematical induction, parity arguments, and the pigeonhole principle. The site contains a link to various example...
CK-12 Foundation
Ck 12: Interactive Geometry: 4.1 Theorems and Proofs
Understand theorems and proofs as they relate to geometry.
Cut the Knot
Cut the Knot!: Proofs in Mathematics
This site provides an explanation of mathematical proofs. It also has links to different types of proofs.