Stages / 2
Stage 2 · about 9–12
New Numbers
When the unit changes, what happens to the number?
Fractions on the number line, decimals, ratio, area by cutting and moving, volume, the mean. Most children who fall behind fall behind here, at fractions.
All videos in this stage
- 6 1/2 and 2/4 Are the Same Point Coming soon
- 7 Why Do Fractions Need a Common Denominator? Coming soon
- 8 Multiplying Fractions: A Part of a Part Coming soon
- 9 Why Dividing by a Fraction Means Flip and Multiply Coming soon
- 10 Ratios: Shapes That Survive the Magnifying Glass Coming soon
- 11 Parallelogram Area: One Cut, One Slide Coming soon
- 12 Where Does the ½ in Triangle Area Come From? Coming soon
- 13 Circle Area: Slice the Circle Like a Pizza Coming soon
- 14 Why Is a Cone One Third of a Cylinder? Planned
- 35 The Mean Levels the Peaks and Fills the Valleys Coming soon