Curated OER
Central Valley Math Project
Middle schoolers study the Pythagorean Theorem. They describe what it means to square a number. Pupilsuse the Pythagorean Theorem to prove the sides of given triangles, and use geometric pieces of paper to create a right triangle and...
Curated OER
Euclidean Direct Proofs
Learning how to prove theorems in geometry can be challenging. This resource explains what a proof is, and the different styles for proofs. It also contains links to web-based practice problems that help guide learners though example...
Curated OER
Worksheet 4.12, Induction
In this math worksheet, students prove given propositions for all integer values of the variable. Students use induction to prove statements true.
Curated OER
Math: Are They the Same - or Knot?
Students discover the equivalence between knots and math through a manipulative exploration. In pairs, they select three sets of identical knots and change their forms without breaking the knots apart. Students pass them along to the...
University of Cambridge
University of Cambridge: Nrich: Irrational Proof
This site contains a proof that the square roots of all prime numbers are irrational.
Science Education Resource Center at Carleton College
Serc: Pythagorean Theorem Investigations
In this activity, learners will gain an understanding of the Pythagorean theorem and will recognize the variety of ways in which theorems can be proved algebraically, geometrically and visually.