Illustrative Mathematics
Coupon Versus Discount
All too often stores give coupons for an item, but when you go into buy it, the item is on discount. The store won’t take the coupon if the discount is used. So what do you do, use the coupon or take the discount? This activity...
Curated OER
Comparing a Number and a Product
Mental math strategies are important for fifth graders to be able to determine the greater sum without actually solving the equations. As a summative assessment, this eight-problem worksheet can give insight into the understanding of the...
101 Questions
Trashketball
Take a shot using a lesson on volume! Young learners watch a video showing a trashcan filling with paper balls. The task is to calculate the number of paper balls that will fit in the can. Pupils use volume calculations to make a...
Teach Engineering
Let's Take a Spin: One-Axis Rotation
Investigate the effect of one-axis rotations on geometric figures. Scholars learn to use snap cubes and the right-hand rule to draw figures after rotations about the x-, y-, or z-axes. They try their hands at examples created by the...
Japan Society
Changing Times, Changing Styles: New Japanese Literary Styles of the Late Nineteenth Century
Focusing on Doppo's "Unforgettable People" and late nineteenth century Japanese literature, this resource also leads to discussions of form being dictated by content. Explore the development of new literary styles first-hand by...
Teachnology
Teachnology: Arithmetic Theme
Arithmetic Theme provides an excellent collection of free sample worksheets, teacher resources, lesson plans and interactive media to support addition, subtraction, multiplication and division.
Teachnology
Teachnology: Arithmetic Theme
Arithmetic Theme provides an excellent collection of free sample worksheets, teacher resources, lesson plans and interactive media to support addition, subtraction, multiplication and division.
Homeschool Math
Homeschool Math: Dividing Decimals Mental Math
Complete lesson with instruction and exercises, teaching students how to divide decimals using mental math.
Can Teach
Can Teach: Who Has More or Less?
Want to practice addition and subtraction skills in a new and exciting way? Use this online math lesson card game activity.
Lawrence Hall of Science
The Math Page: Skill in Arithmetic: The Meaning of Multiplication: Mental Calculation
If you are looking for a website that explains and defines the basics of mental multiplication with helpful hints then you have arrived at an excellent resource. There are even practice problems at the very end of the lesson.
AAA Math
Aaa Math: Mentally Adding Two Digit Numbers
This site explains how to mentally add two-digit numbers. Gives exercises and games to practice this skill.
Scholastic
Scholastic: Max's Math Adventures: A Sweet Story
In this Max's Math Adventure, estimate pieces of candy with Max, Ruthie, and Pop. Features include a teacher's guide, activity sheet, and extra challenges.