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

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.

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.

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.

Apply concepts of unit fractions and multiplication to number lines.

- Estimate fractions >1 and whole numbers using unit fractions on a number line.
- Estimate products of whole numbers and fractions on a number line.
- Visual feedback models multiplication of fractions as iteration of unit fractions.

Count and match sets of up to 10 objects.

- Develop counting strategies such as 1:1 correspondence and cardinality.
- Levels begin by just clicking on given objects, then progress to selecting equivalent number of squares in the ground.
- As the levels transition, students internalize strategies and connect numerals to the counting sequence.

Develop addition concepts by finding the total number of blocks.

- Add blocks at the start (left side) to the blocks in the middle by selecting the total number of blocks at the end (right side).
- Develop and apply strategies for solving visual addition problems.
- Levels start with sums ≤ 5 by adding up to 2 more blocks and transition to sums up to 10.

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