All the activities in this lesson are addition and subtraction based. It is not designed to introduce addition and subtraction, rather, to supplement and enrich lessons already being taught. This lesson is not designed to be completed in one sitting. It may be done throughout an entire addition and subtraction unit. These activities may be used as starter activities when introducing new math concepts, particularly those that relate to addition and subtraction.

The purpose of the task is for students to solve a multi-step multiplication problem in a context that involves area. In addition, the numbers were chosen to determine if students have a common misconception related to multiplication.

This lesson unit is intended to help you assess how well students are able to: Calculate the mean, median, mode, and range from a frequency chart; and to use a frequency chart to describe a possible data set, given information on the mean, median, mode, and range.

In this Cyberchase video segment, the CyberSquad helps resolve a dispute about the squares on the Gollywood Walk of Fame.

This short video and interactive assessment activity is designed to teach fifth graders about converting centimeters to millimeters with decimals.

The purpose of this task is to help students realize there are different ways to add mixed numbers and is most appropriate for use in an instructional setting.

This short video and interactive assessment activity is designed to teach fifth graders about multiplying and dividing decimals - word problems.

This short video and interactive assessment activity is designed to teach fifth graders about mixed problems in fractions.

This short video and interactive assessment activity is designed to teach third graders about mixed review (numbers up to 100,000).

In this interactive activity adapted for grades 3–5 from Annenberg Learner’s Teaching Math Grades 6–8, use virtual Cuisenaire® Rods to represent fractions and to perform operations with fractions.

This task is designed to help students focus on the whole that a fraction refers to. It helps students to realize that two different fractions can describe the same situation depending on what you choose to be the whole.

In Monster School Bus, students play a newly hired bus driver with a certain number of seats on the bus. The mission: to pick up each neighborhood’s little monsters and bring them to school – without dividing up groups (monsters don’t like that).
In early levels, each little monster takes up one seat and players combine integers to add up to 10. Each new neighborhood exposes learners to a more complex set of numbers, including decimals and fractions. The design of characters and locations gives the game an edgy look, and provides a more mature atmosphere to a game covering fairly juvenile content (e.g., buildings transform into punk Monster Buildings as a reward for picking up kids). This is important: though students learn this concept of number chunking in earlier grades, they often fail to understand it conceptually. Therefore, this content could turn off older students if they feel the game is “below them.” The edgy character design helps make the content feel more age-appropriate, and the graphical details impact gameplay and motivate players to visualize numbers as sets and quantities and think harder about relationships among numbers and number systems.

This short video and interactive assessment activity is designed to teach fourth graders about distance between items.

This short video and interactive assessment activity is designed to teach fifth graders about distance between items.

This short video and interactive assessment activity is designed to teach fifth graders about solving multi-step distance problems.

This short video and interactive assessment activity is designed to teach fourth graders about multi-step money problems.

This short video and interactive assessment activity is designed to teach third graders about finding the number from the figure patterns.

This short video and interactive assessment activity is designed to teach third graders about multiples - word problems.

This short video and interactive assessment activity is designed to teach fourth graders about multiples - word problems.