8 Math Standards / Action Plan
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Domain
Description of DomainStandardDescription of StandardCombined Standard# of Students Requiring Intervention# of Students Achieving Mastery% of Students Achieving Mastery
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□ 8.NSThe Number SystemAKnow that there are numbers that are not rational, and approximate them by rational numbers.□ 8.NS.A
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□ 8.NSThe Number SystemA.1Know 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 eventually, and convert a decimal expansion which repeats eventually into a rational number.□ 8.NS.A.1
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□ 8.NSThe Number SystemA.2Use rational approximations of irrational numbers to compare the size of irrational numbers, locate them approximately on a number line diagram, and estimate the value of expressions (e.g., π²). For example, by truncating the decimal expansion of √2, show that √2 is between 1 and 2, then between 1.4 and 1.5, and explain how to continue on to get better approximations. □ 8.NS.A.2
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■ 8.EEExpressions and EquationsAWork with radicals and integer exponents.■ 8.EE.A
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■ 8.EEExpressions and EquationsA.1Know and apply the properties of integer exponents to generate equivalent numerical expressions. For example, 3² × 3⁻⁵ = 3⁻³ = 1/3³ = 1/27.■ 8.EE.A.1
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■ 8.EEExpressions and EquationsA.2Use square root and cube root symbols to represent solutions to equations of the form x² = p and x³ = p, where p is a positive rational number. Evaluate square roots of small perfect squares and cube roots of small perfect cubes. Know that √2 is irrational.■ 8.EE.A.2
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■ 8.EEExpressions and EquationsA.3Use numbers expressed in the form of a single digit times an integer power of 10 to estimate very large or very small quantities, and to express how many times as much one is than the other. For example, estimate the population of the United States as 3 × 10⁸ and the population of the world as 7 × 10⁹, and determine that the world population is more than 20 times larger.■ 8.EE.A.3
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■ 8.EEExpressions and EquationsA.4Perform operations with numbers expressed in scientific notation, including problems where both decimal and scientific notation are used. Use scientific notation and choose units of appropriate size for measurements of very large or very small quantities (e.g., use millimeters per year for seafloor spreading). Interpret scientific notation that has been generated by technology.■ 8.EE.A.4
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■ 8.EEExpressions and EquationsBUnderstand the connections between proportional relationships, lines, and linear equations.■ 8.EE.B
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■ 8.EEExpressions and EquationsB.5Graph proportional relationships, interpreting the unit rate as the slope of the graph. Compare two different proportional relationships represented in different ways. For example, compare a distance-time graph to a distance-time equation to determine which of two moving objects has greater speed.■ 8.EE.B.5
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■ 8.EEExpressions and EquationsB.6Use similar triangles to explain why the slope m is the same between any two distinct points on a non-vertical line in the coordinate plane; derive the equation y = mx for a line through the origin and the equation y = mx + b for a line intercepting the vertical axis at b.■ 8.EE.B.6
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■ 8.EEExpressions and EquationsCAnalyze and solve linear equations and pairs of simultaneous linear equations.■ 8.EE.C
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■ 8.EEExpressions and EquationsC.7Solve linear equations in one variable.■ 8.EE.C.7
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■ 8.EEExpressions and EquationsC.7.AGive examples of linear equations in one variable with one solution, infinitely many solutions, or no solutions. Show which of these possibilities is the case by successively transforming the given equation into simpler forms, until an equivalent equation of the form x = a, a = a, or a = b results (where a and b are different numbers).
■ 8.EE.C.7.A
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■ 8.EEExpressions and EquationsC.7.BSolve linear equations with rational number coefficients, including equations whose solutions require expanding expressions using the distributive property and collecting like terms.
■ 8.EE.C.7.B
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■ 8.EEExpressions and EquationsC.8Analyze and solve pairs of simultaneous linear equations.■ 8.EE.C.8
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■ 8.EEExpressions and EquationsC.8.AUnderstand that solutions to a system of two linear equations in two variables correspond to points of intersection of their graphs, because points of intersection satisfy both equations simultaneously.
■ 8.EE.C.8.A
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■ 8.EEExpressions and EquationsC.8.BSolve systems of two linear equations in two variables algebraically, and estimate solutions by graphing the equations. Solve simple cases by inspection. For example, 3x + 2y = 5 and 3x + 2y = 6 have no solution because 3x + 2y cannot simultaneously be 5 and 6.
■ 8.EE.C.8.B
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■ 8.EEExpressions and EquationsC.8.CSolve real-world and mathematical problems leading to two linear equations in two variables. For example, given coordinates for two pairs of points, determine whether the line through the first pair of points intersects the line through the second pair.
■ 8.EE.C.8.C
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■ 8.FFunctionsADefine, evaluate, and compare functions.■ 8.F.A
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■ 8.FFunctionsA.1Understand that a function is a rule that assigns to each input exactly one output. The graph of a function is the set of ordered pairs consisting of an input and the corresponding output.■ 8.F.A.1
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■ 8.FFunctionsA.2Compare properties (e.g. rate of change, intercepts, domain and range) of two functions each represented in a different way (algebraically, graphically, numerically in tables, or by verbal descriptions). For example, given a linear function represented by a table of values and a linear function represented by an algebraic expression, determine which function has the greater rate of change.■ 8.F.A.2
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■ 8.FFunctionsA.3Interpret the equation y = mx + b as defining a linear function, whose graph is a straight line; give examples of functions that are not linear. For example, the function A = s² giving the area of a square as a function of its side length is not linear because its graph contains the points (1,1), (2,4) and (3,9), which are not on a straight line.■ 8.F.A.3
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■ 8.FFunctionsBUse functions to model relationships between quantities.■ 8.F.B
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■ 8.FFunctionsB.4Construct a function to model a linear relationship between two quantities. Determine the rate of change and initial value of the function from a description of a relationship or from two (x, y) values, including reading these from a table or from a graph. Interpret the rate of change and initial value of a linear function in terms of the situation it models, and in terms of its graph or a table of values.■ 8.F.B.4
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■ 8.FFunctionsB.5Describe qualitatively the functional relationship between two quantities by analyzing a graph (e.g., where the function is increasing or decreasing, linear or nonlinear). Sketch a graph that exhibits the qualitative features of a function that has been described verbally.■ 8.F.B.5
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■ 8.GGeometryAUnderstand congruence and similarity using physical models, transparencies, or geometry software.■ 8.G.A
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■ 8.GGeometryA.1Verify experimentally the properties of rotations, reflections, and translations:■ 8.G.A.1
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■ 8.GGeometryA.1.ALines are transformed to lines, and line segments to line segments of the same length.■ 8.G.A.1.A
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■ 8.GGeometryA.1.BAngles are transformed to angles of the same measure.■ 8.G.A.1.B
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■ 8.GGeometryA.1.CParallel lines are transformed to parallel lines.■ 8.G.A.1.C
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■ 8.GGeometryA.2Understand that a two-dimensional figure is congruent to another if the second can be obtained from the first by a sequence of rotations, reflections, and translations; given two congruent figures, describe a sequence that exhibits the congruence between them.■ 8.G.A.2
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■ 8.GGeometryA.3Describe the effect of dilations, translations, rotations, and reflections on two-dimensional figures using coordinates.■ 8.G.A.3
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■ 8.GGeometryA.4Understand that a two-dimensional figure is similar to another if the second can be obtained from the first by a sequence of rotations, reflections, translations, and dilations; given two similar two-dimensional figures, describe a sequence that exhibits the similarity between them.■ 8.G.A.4
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■ 8.GGeometryA.5Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles. For example, arrange three copies of the same triangle so that the sum of the three angles appears to form a line, and give an argument in terms of transversals why this is so.■ 8.G.A.5
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■ 8.GGeometryBUnderstand and apply the Pythagorean Theorem.■ 8.G.B
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■ 8.GGeometryB.6Explain a proof of the Pythagorean Theorem and its converse.■ 8.G.B.6
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■ 8.GGeometryB.7Apply the Pythagorean Theorem to determine unknown side lengths in right triangles in real-world and mathematical problems in two and three dimensions.■ 8.G.B.7
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■ 8.GGeometryB.8Apply the Pythagorean Theorem to find the distance between two points in a coordinate system.■ 8.G.B.8
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○ 8.GGeometryCSolve real-world and mathematical problems involving volume of cylinders, cones, and spheres.○ 8.G.C
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○ 8.GGeometryC.9Know the formulas for the volumes of cones, cylinders, and spheres and use them to solve real-world and mathematical problems.○ 8.G.C.9
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□ 8.SPStatistics and ProbabilityAInvestigate patterns of association in bivariate data.□ 8.SP.A
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□ 8.SPStatistics and ProbabilityA.1Construct 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.A.1
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□ 8.SPStatistics and ProbabilityA.2Know 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, and informally assess the model fit (e.g. line of best fit) by judging the closeness of the data points to the line.□ 8.SP.A.2
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□ 8.SPStatistics and ProbabilityA.3Use the equation of a linear model to solve problems in the context of bivariate measurement data, interpreting the slope and intercept. For example, in a linear model for a biology experiment, interpret a slope of 1.5 cm/hr as meaning that an additional hour of sunlight each day is associated with an additional 1.5 cm in mature plant height.□ 8.SP.A.3
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□ 8.SPStatistics and ProbabilityA.4Understand that patterns of association can also be seen in bivariate categorical data by displaying frequencies and relative frequencies in a two-way table. 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. For example, collect data from students in your class on whether or not they have a curfew on school nights and whether or not they have assigned chores at home. Is there evidence that those who have a curfew also tend to have chores?□ 8.SP.A.4
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