Play select games from the ST Math first grade curriculum. Concepts include place value, addition, subtraction, number line, shapes, and more.

## Tens and Ones with Spaceships

Count and represent numbers to 20 using place value.
• Decompose numbers into groups of tens and ones by using visual models.
• Levels begin with representing sets of spaceships ≤10 on a ten frame, then move to representing ≤20 spaceships by creating a set of 10 and 1’s.

## Push Box Addition and Subtraction

Develop strategies for solving addition and subtraction problems.
• Use problem solving strategies to find missing values in visual addition and subtraction situations where blocks are added or subtracted.
• Determine if a situation requires addition or subtraction, or a combination of both.
• Levels begin with finding sums or differences given a visual model, then move to determining which value (a missing addend or subtrahend) is needed.

## Numbers on a Number Line

Estimate and plot numbers on number lines to 20.
• Build the concept of numbers as equidistant points on a line by plotting and estimating numbers to 20.
• Levels start by using number lines to 10 ticked and labeled with all the numbers, then progress to showing only benchmark numbers.
• Apply concepts of numbers on a number line to estimate numbers to 20.

## Composite Shapes

Create a composite shape by arranging the given shapes.
• Compose a given 2-dimensional shape by using smaller shapes.
• Levels begin by simple matching of shapes, then move to more complex problems that require close attention to specific attributes of given shapes.
• Develop spatial strategies for reasoning about angles and sides to compose a larger shape.

## Making Tens and Ones with Ten Frames

Decompose quantities less than 20 into tens and one using visual models and equations.
• Represent numbers 11-19 as a set of 10 and 1’s using ten frame models