A collection of Math brain teasers.

For this problem, learners use an exponential equation to investigate the cooling of a cup of coffee and how long it would take for it to cool down to different temperatures. Aligns with F-LE.B.5 and F-LE.A.4.

This math lesson shows how differential equations apply to Newton's Law of Cooling.

Scholars examine applications of differential equations. Examples explore how differential equations are used to model population, Newton's law of cooling, and engineering systems.

This site has some interesting ways to collect and evaluate data. There are some activities about note taking, spreadsheets, surveys, and a cool bridge construction project. Teachers may want to use this site as a resource for some...

A step-by-step tutorial showing how to add 2-digit numbers in place value columns without regrouping. Includes exercises to try. CCSS.Math.Content.3.NBT.A.2 Fluently add and subtract within 1000

Step-by-step tutorial showing how to add 3-digit numbers in place value columns with and without regrouping. CCSS.Math.Content.3.NBT.A.2 Fluently add and subtract within 1000

Uses visual models to explain what division is and includes sample problems to try. It also offers links to division games.

Uses visual models to explain what subtraction is and includes suggested activities for parents to try at home. It also provides links to subtraction games and more.

Explains what fractions are using visual models and includes sample problems to try.

Uses visual models to explain what mixed numbers are and includes sample problems to try.

Explains what equivalent fractions are using visual models and includes sample problems to try.

Uses visual models to explain what addition is and includes suggested activities for parents to try at home.

Uses visual models to explain what multiplication is and includes sample problems to try.

Is it better to by block ice or crushed ice? Use your logical reasoning and measurement skills to solve this challenge that compares surface area of block ice and the same block cut into three cubes. A one page activity from the NCTM...

If you know how to count by tens, you can solve multiplication problems in which ten is a factor.

A large collection of tutorials covering concepts in addition, subtraction, multiplication, division, and fractions.

A page showing real life applications of natural logarithms in exponential grown and decay functions and Newton's law of cooling. Also includes exercises.

A gallery of complex polyhedra with descriptions and characteristics.

An interactive for working with ten frames or a variation of one. Choose characters or shapes for counters and lay them out in your frame. There are tools for duplicating, rotating, drawing, and deleting, as well as for typing an...

Step-by-step tutorial showing how to subtract numbers less than 1000 in place value columns with and without regrouping. Includes sample problems to try.

A step-by-step tutorial showing how to subtract using two-digit numbers in the tens and ones columns with regrouping. Includes sample problems to try. It also provides links to subtraction games and more.

Reviews what place value is and how it is used in addition. Includes exercises to try.

Demonstrates how to add fractions where the denominators are the same. Includes sample problems to try.