New ReviewTen questions make up an interactive all about integers. Scholars answer multiple choice, short answer, and discussion questions using a 4x4 chessboard and dominoes.

New ReviewThere's got to be a better way. Scholars learn that the distributive property does work with subtraction and not just addition. Using that fact, the video shows how to find the product of two numbers by rewriting a complicated number as...

New ReviewWho pilfered the pin? Scholars practice measurement skills as they solve the mystery of a stolen pin. They measure length, temperature, and mass and determine which of select suspects committed the crime. During the STEM hands-on...

New ReviewBag the sweet resource for later use! Pupils learn about engineering design by developing a new, improved bag for candy from thin plastic sheets or from paper. The bags are to be visually appealing, but should also be functional. To...

New ReviewHere's a resource teachers won't want to wash their hands of. Given a task where a full bar of soap is on one side of a balance and 3/4 of a bar of soup and a 3/4-ounce weight is on the other side, young mathematicians must determine the...

New ReviewCould you develop your own way to add fractions with unlike denominators? An in-depth task has scholars examine a fictional conversation between several people in which they discuss a method of adding fractions with unlike denominators....

New ReviewIf the fractions don't have a common denominator, make them have one. Learners first read and analyze a conversation of pupils trying to add 2/5 and 1/2. They compare the process of adding fractions to the process of adding quantities...

New ReviewMultiplying fractions doesn't need to be a mystery. An interesting task has scholars question why the standard algorithm for multiplying fractions works for all fractions. It requires them to read a conversation about a solution method...

New ReviewThree heads are better than one. After reading a conversation between three friends about how to compare fractions, scholars analyze and discuss each presented strategy. These include using unit fractions, using benchmark fractions,...

New ReviewCatch me if you can. Scholars collect data on reaction time by catching a falling ruler or by using an Internet app. They determine the median of the data, create graphs, and analyze the results. They also compare their data to the rest...

New ReviewDoes lemonade taste better when yellow? A tasty experiment has scholars determine the answer to the question. It requires conducting a taste test with lemonades of different colors (from food coloring), and then collecting and analyzing...

New ReviewEveryone's a winner. Scholars analyze a spinner with five unequal sections, three of which represent winning a toy car and the other two represent winning a toy truck. They conduct an experiment to estimate the number of toy cars and...

New ReviewSpin to win a toy car. A fun activity has pupils use a spinner in which three of the equal sections represent winning a toy car, and the fourth section represents no car. They record the number of wins after certain numbers of spins,...

New ReviewGraph growth in the US. Given population and area data for the United States for a period of 200 years, class members create graphs to interpret the growth over time. Graphs include population, area, population density, and population...

New ReviewSubtraction does not work with the commutative property ... or does it? Confronted with a difficult problem, the narrator realizes that by writing the subtractions as adding a negative, he can rearrange the problem. Pupils learn that as...

New ReviewUse reciprocals for the purpose of division. The video shows how to use reciprocals to rewrite division problems. Pupils see that the definition of division as the multiplication by the reciprocal works for all types of numbers. 

New ReviewIf there is something in addition to get to the identity, does the same exist for multiplication? Using negative numbers to talk about the identity of addition, the video asks the question whether something similar exists for...

New ReviewDive deeper into subtraction. The presenter shows two more ways to use the definition of subtraction to solve subtraction problems. Using the distributive and commutative properties, pupils learn how to solve problems such as subtracting...

New ReviewWhat is the definition of subtraction when dealing with negatives? The short video provides the definition of subtraction. Scholars observe as the presenter applies the definition to examples with negative numbers.

New ReviewFor a change, order does not matter. A short video provides a definition of the commutative property of addition. Pupils develop an understanding that—unlike some operations—order does not matter for addition problems.

New ReviewIs a repeated addition definition mathematically valid? Using mathematical properties, a video explains why, even though there is a connection between repeated addition and multiplication, it is not a good definition. The properties hold...

New ReviewGroupings are the way to go! The short video provides a description of the associative property of addition and gives an example. Learners view how to write the property using variables.

New ReviewGet a clearer picture of working with fractions. While continuing to work with fractions as parts, the video shows how to use drawing to compare and add fractions. Worksheets then provide opportunities for pupils to practice comparing,...

New ReviewA football-themed interactive focuses on integers. Seven questions challenge scholars to show what they know by way of short answers, multiple-choice, and true or false. An open-ended question followed by a discussion concludes the...