Math

Special Triangles

Contributor: John Goering | File type : Teaching Material

This enrichment activity looks at three special types of triangles with side lengths that are all whole numbers. One type of triangle has a 60° angle. Another type has a 120° angle.For the third... Read More

2-D and 3-D Congruence

Contributor: John Goering | File type : Teaching Material

We were designed to perceive a 3-D world and cannot always trust our perception regarding the congruence of 2-D objects. Geometry students might not believe you if you tell them that parallelogram A i... Read More

Matrix Multiplication and Pythagorean Triples

Contributor: John Goering | File type : Teaching Material

This enrichment activity uses matrix multiplication to generate primitive Pythagorean triples. Any primitive Pythagorean triple other than [3 4 5] can be produced from [3 4 5] by using no more than th... Read More

Getting around the Chalkboard: Digital Graphing Tools for Better Student Interaction

Contributor: Jason Beachy | Length : 6 | File type : Video

If you teach algebra using the Cartesian plane method, your students are familiar with graphing paper. That is perfect for work at their desk, but how can you practice and check work together as a cla... Read More

Spot Checks, Hooks, and Sweet Rewards: Ideas for Elementary Math

Contributor: Betty Yoder | File type : Blog Post

Recently as I recounted several math ideas I find beneficial in the classroom, I thought perhaps sharing them could inspire another teacher.  After all, don’t we regularly beg, borrow, and steal id... Read More

The Math They See, the Math They Use: Demonstrating Concepts with Math Manipulatives

Contributor: Piper Burdge | Length : 16 | File type : Video

In math, we expect students to memorize steps and learn processes with the hope that they will understand the concepts as they use them. But this last step—understanding—often never happens, say P... Read More

Show Me a Way to Make Eleven: How I Teach Math with Rekenreks

Contributor: Ruth Anna Kuhns | Length : 6 | File type : Video

"Rekenreks are similar to an abacus," Ruth Anna wrote in a blog post, "although much more economical... With some cardboard, fish line, large beads, and hot glue, you can create your own stash."... Read More

High School Geometry Syllabus

Contributor: Brian J Martin | File type : Curricular

Brian prepared this syllabus for Geometry by Bob Jones Press. However, the document provides a wealth of ideas and structure for any high school geometry class. Course Description Geometry, as the ... Read More

Pre-Algebra Class Work 7.1

Contributor: Brian J Martin | File type : Teaching Material

Class Worksheet to go with Lesson 7.1 Pre-Algebra Bob Jones Math. Practice in changing numbers between fractions, decimals, and percentages.Download this document or read it below.... Read More

Pre-Algebra Class Work 11.3

Contributor: Brian J Martin | File type : Teaching Material

Class Worksheet to go with Lesson 11.3 Pre-Algebra Bob Jones Math. Practice in solving an algebraic expression where the variable is squared.Download this document or read it below.... Read More