Estimate fractions on a number line using circle models.
Develop the concept of fractions as numbers on a number line using circle models (wheels).
Understand that a whole wheel unrolls to measure the unit whole (distance from 0 to 1).
Levels begin by estimating points on a number line using wholes and halves, then progress to representing points on a number line using unit fraction models.
Develop the concept of area as measured by squares and perimeter as measured by linear units.
Levels begin with visual models and selecting squares or sticks for area or perimeter, then advance to creating rectangles for a given area and perimeter.
Apply strategies for multiplication and addition to solve multi-step problems.