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Play select games from the ST Math eighth grade curriculum for free. Concepts include exponents, graphing linear equations, and solving linear equations.

Represent an exponential growth pattern using exponents and exponential notation.

- Represent visual models of exponential change with integer exponents.
- Interpret exponential functions as visual growth patterns (positive integers) or shrinking patterns (negative integers).
- Levels begin with positive exponential growth and progress to seeing negative integers as an inverse function.

Change slope and y-intercept values to pop balloons plotted in a straight line.

- Manipulate the y-intercept values that form a line going through balloons plotted on a graph.
- Change the y-intercept and slope on a graph and see how the values change in a linear equation in slope-intercept form.
- Levels begin with visually manipulating the y-intercept so the given line will pop balloons and progress to comparing changes in the graph to changes in the corresponding equation.

Fill in table values and plot points using a linear equation.

- Solve linear equations using a table in slope-intercept form.
^{ } - Represent linear equations using tables and graphs.
- Levels begin by finding the y-value on a table, then progress to plotting points using linear equations and y-values.

Find the value of the slope and y-intercept in linear equations given a graph of the line.

- Interpret a line's slope and y-intercept and represent them in a linear equation in slope-intercept form.
- Use changes in x and y-values to identify the slope of a line and the y-intercept of a line as the point where x=0.
- Levels start with slopes = 1 and y-intercepts at the origin and progress to more challenging slopes and y-intercepts.

Solve visual equations of the form px = r, where p and x are positive rational numbers (of the form a/b).

- Visual puzzles pose two-step problems that have students work backwards from a given total number of blocks needed and select the starting quantity of blocks.
- Use the visual model to reason about linear relationships px = r where p and x are rational numbers.
- Levels start by posing problems with whole number coefficients, then progress to using rational number coefficients.

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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