The Common Core in South Dakota

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Skills available for South Dakota eighth-grade math standards

Standards are in black and IXL math skills are in dark green. Hold your mouse over the name of a skill to view a sample question. Click on the name of a skill to practice that skill.

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8.NS The Number System

  • Know that there are numbers that are not rational, and approximate them by rational numbers.

    • 8.NS.1 Know that numbers that are not rational are called irrational. Understand informally that every number has a decimal expansion; for rational numbers show that the decimal expansion repeats or terminates. Convert a decimal expansion which repeats or terminates into a rational number.

    • 8.NS.2 Use rational approximations of irrational numbers to compare the size of irrational numbers. Locate irrational numbers approximately on a number line diagram, and estimate the value of expressions such as (π²).

8.EE Expressions and Equations

8.F Functions

8.G Geometry

8.SP Statistics and Probability

  • Investigate patterns of association in bivariate data.

    • 8.SP.1 Construct and interpret scatter plots for bivariate measurement data to investigate patterns of association between two quantities. Describe patterns such as clustering, outliers, positive or negative association, linear association, and nonlinear association.

    • 8.SP.2 Know that straight lines are widely used to model relationships between two quantitative variables. For scatter plots that suggest a linear association, informally fit a straight line (i.e., line of fit), and informally assess the model fit by judging the closeness of the data points to the line.

    • 8.SP.3 Use the equation of a linear model to solve problems in the context of bivariate measurement data, interpreting the slope and the y-intercept.

    • 8.SP.4 Construct and interpret a two-way table summarizing data on two categorical variables collected from the same subjects. Use relative frequencies calculated for rows or columns to describe possible association between the two variables.