Play select games from the ST Math fourth grade curriculum. Concepts include number lines, fraction addition and subtraction, and more.

## Number Line Zoom

Use place value to plot multi-digit numbers on a number line.
• Apply place value to locate numbers on number lines from 0 to 1 million.
• Number lines show numbers of the largest place value, clicking between numbers zooms in to show the next place value.
• Levels begin with 4-digit numbers, then advance to 6-digit numbers.

## Lines of Symmetry

Find lines of symmetry that fold shapes into congruent halves.
• Develop concept and language for lines of symmetry.
• Find the line of symmetry for polygons.
• Levels begin with finding one line of symmetry, then advance to finding multiple lines of symmetry for a given shape.

## JiJi Cycle - Fraction Addition and Subtraction

Estimate fraction sums and differences
• Use visual fraction models to estimate sums and differences on number lines.
• Levels begin with visual models, then progress to fraction notation.

Add and subtract fractions with like denominators
• Use number lines to model fraction sums and differences.
• Add and subtract fractions and mixed numbers.
• Feedback shows visual models proof of sums and differences.

## Creatures and Boots Problem Solving

Solve multi-step problems involving multiple operations
• Develop problem solving strategies for finding combinations of creatures and boots.
• Levels begin with finding the number of boots for a given combination of creatures, then advance to finding combinations of creatures given a set of boots.
• Problems begin with visual models and transition to visual-symbolic models.