100 guided animations · 10 topic units · Free to explore
Make a prediction, change a value, and explain the result. Work through each unit in order or choose the topic you want to understand today. Every investigation has controls, a worked explanation, and a question to test your reasoning.
Your collection at a glance
Add thirds and fourths in twelfths
Investigations 1–10
Subtract sixths from fourths
Investigations 11–20
Take a fraction of a fractional area
Investigations 21–30
Count fractional portions in whole units
Investigations 31–40
Multiply a decimal price by a count
Investigations 41–50
Stack equal layers of unit cubes
Investigations 51–60
Go across before moving up
Investigations 61–70
Connect decimal kilograms with grams
Investigations 71–80
Predict an additive number pattern
Investigations 81–90
Redistribute data without changing the total
Investigations 91–100
Related investigations use the same mathematical model with different questions and starting values. Reset restores the values used in that investigation’s worked answer. Read its assumptions before applying a model to a new situation.
100 animations · Showing 1–20
Grade 5 · Fractions
Add thirds and fourths in twelfths · Investigation 1 of 100
A measured supply at a model solar-energy project combines 1/3 of a unit with another 1/4 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Add thirds and fourths in twelfths · Investigation 2 of 100
A measured supply at a wildlife field study combines 2/3 of a unit with another 2/4 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Add thirds and fourths in twelfths · Investigation 3 of 100
A measured supply at a school café combines 3/3 of a unit with another 3/4 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Add thirds and fourths in twelfths · Investigation 4 of 100
A measured supply at a maker space combines 4/3 of a unit with another 4/4 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Add thirds and fourths in twelfths · Investigation 5 of 100
A measured supply at a river study combines 5/3 of a unit with another 5/4 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Add thirds and fourths in twelfths · Investigation 6 of 100
A measured supply at a sports day combines 6/3 of a unit with another 6/4 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Add thirds and fourths in twelfths · Investigation 7 of 100
A measured supply at a community-park design combines 1/3 of a unit with another 7/4 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Add thirds and fourths in twelfths · Investigation 8 of 100
A measured supply at a museum workshop combines 2/3 of a unit with another 8/4 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Add thirds and fourths in twelfths · Investigation 9 of 100
A measured supply at an irrigation model combines 3/3 of a unit with another 1/4 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Add thirds and fourths in twelfths · Investigation 10 of 100
A measured supply at a food-science activity combines 4/3 of a unit with another 2/4 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Subtract sixths from fourths · Investigation 11 of 100
A measured supply at a model solar-energy project combines 4/4 of a unit with the removal of 0/6 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Subtract sixths from fourths · Investigation 12 of 100
A measured supply at a wildlife field study combines 5/4 of a unit with the removal of 1/6 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Subtract sixths from fourths · Investigation 13 of 100
A measured supply at a school café combines 6/4 of a unit with the removal of 2/6 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Subtract sixths from fourths · Investigation 14 of 100
A measured supply at a maker space combines 7/4 of a unit with the removal of 3/6 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Subtract sixths from fourths · Investigation 15 of 100
A measured supply at a river study combines 8/4 of a unit with the removal of 4/6 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Subtract sixths from fourths · Investigation 16 of 100
A measured supply at a sports day combines 9/4 of a unit with the removal of 0/6 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Subtract sixths from fourths · Investigation 17 of 100
A measured supply at a community-park design combines 10/4 of a unit with the removal of 1/6 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Subtract sixths from fourths · Investigation 18 of 100
A measured supply at a museum workshop combines 11/4 of a unit with the removal of 2/6 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Subtract sixths from fourths · Investigation 19 of 100
A measured supply at an irrigation model combines 12/4 of a unit with the removal of 3/6 of the same unit. Change the controls and explain what the animation reveals.
Explore animationGrade 5 · Fractions
Subtract sixths from fourths · Investigation 20 of 100
A measured supply at a food-science activity combines 4/4 of a unit with the removal of 4/6 of the same unit. Change the controls and explain what the animation reveals.
Explore animation