Ratio errors confuse one of the coaches in an epic dodgeball tournament.

Addresses: Ratios can represent part-whole or part-part relationships.

This humorous animation visualizes the ratio of words spoken on a series of dates.

Addresses: Proportions as multiplicative situations. Proportional relationships can be related to a common rate in direct variations.

A passionate activist clarifies equality on a number line.

Addresses: Equality and order on the number line. Number line properties.

Rulers value proper units and proportional details.

Addresses: Various techniques are helpful in solving proportion, including tables, graphs, measurement, and equations. Given an application problem, using the units can help to set up the correct proportion. When proportions are graphed on a coordinate plane, the graph is linear.

Pearl Diver addresses number and operations standards - such as number line sense, whole numbers, decimals, mixed numbers and fractions - as established by the National Council of Teachers of Mathematics (NCTM).

Addresses: Equality and order on the number line Number line properties

A crusading superhero clarifies and uses scale factor.

Addresses: Objects that are scale representations of each other have the same shape but not the same size, and the size difference is related to the scale factor.

Math Snacks Video Player includes all available Math Snacks animations.

You're the driver! Fit as many of the little monsters as you can on the bus and drive them to monster school! But there's something odd about the neighborhood...

Addresses: Multiple representations of numbers. Visualize numbers as sets and quanitities. Use base-ten representation.

He pops up when you least expect him. And he can't resist pointing out the rates and "purrportions" in daily life.

Addresses: Comparison of two quantities measured in different units. Establish the relationship between the two units.

Hungry gophers are after the prized carrot. Defend the carrot by placing units on a coordinate grid.

Addresses: Coordinate pairs and plotting numbers. Identifying the four quadrants and differentiating negative coordinates from positive coordinates. Helps establish the fundementals of plotting functions on a grid.

The battle is on in this game where you build your own potions! Check your ratios to win this mixture mix-off!

It guides students in: Identifying ratios when used in a variety of contextual situations. Providing visual representations of ratios. Solving common problems or communicating by using rate, particularly unit rates. Explaining why ratios and rates naturally relate to fractions and decimals.

Evil monsters have been awakened by an ancient force, and it's up to you to stop them and untangle the mystery behind their return.

Addresses: Place values and decimals. Building different numbers on both sides of the decimal place. Creating facility with 10ths and 100ths places. Improving general addition, multiplication, division, and subtraction skills, in the context of working with decimals.