HS Mathematics Item Specification C1 TA
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1 Claim 1: Concepts and Procedures Students can explain and apply mathematical concepts and cay out mathematical procedures with precision and fluency. Content Domain: Number and Quantity Target A [m]: Extend exponents to rational Tasks for this target will require students to use the definition of radicals and rational exponents and identify equivalent numeric and algebraic expressions involving rational exponents and radicals. Tasks for this target will require students to find the exact value of numbers expressed in terms of rational exponents or estimate their magnitude, where appropriate. Claim tasks will tap student understanding of exponents and their ability to identify flawed reasoning applied to this target. Standards: N-RN.A, N-RN.A.1, Related Below- Grade Standards for Purposes of Planning for Vertical Scaling: 8.EE.A, 8.EE.A.1, 8.EE.A.2 N-RN.A Extend exponents to rational N-RN.A.1 Explain how the definition of the meaning of rational exponents follows from extending integer exponents to those values, allowing for a notation for radicals in terms of rational rational exponents using Related Grade 8 standards 8.EE.A Work with radicals and integer 8.EE.A.1 Know and apply integer exponents to generate equivalent numerical expressions. 8.EE.A.2 Use square root and cube root symbols to represent solutions to equations of the form x 2 = p and x = p, where p is a positive rational number. Evaluate square roots of small perfect squares and cube roots of small perfect cubes. Know that the square root of two is iational. DOK Levels: 1, 2 Achievement Level Descriptors: RANGE Achievement Level Descriptor (Range ALD) Target A: Extend the properties of exponents to rational Level 1 Students should be able to rewrite expressions with rational exponents of the form (1/n) to radical form and vice versa. Level 2 Students should be able to look for and use structure to extend integer exponents to multiply and divide expressions with rational exponents that have common denominators. Level Students should be able to rewrite expressions with rational exponents of the form (m/n) to radical form, and vice versa, and look for and use structure to extend integer exponents to all laws of exponents on radical expressions and expressions with rational Level Students should be able to identify the exponent property used when rewriting expressions, and recognize when laws of exponents cannot be used to rewrite an expression. 1. The student rewrites expressions in radical form into an equivalent expression with rational 2. The student rewrites expressions with rational exponents into an equivalent expression in radical form. 1 Version.0
2 . The student uses exponents to write equivalent expressions rational. The student solves equations that require an understanding of the definitions of radicals and rational. The student finds exact or approximate values of numeric expressions involving rational exponents or radicals. 6. The student compares expressions involving rational exponents or radicals with other numbers. Allowable Response single coect ; multiple Types: coect ; Equation/Numeric; Matching Tables Allowable Stimulus numerical expressions involving radicals, numerical expressions Materials: involving rational exponents, algebraic expressions involving radicals, algebraic expressions involving rational exponents Construct-Relevant exponent, radical, rational exponent Vocabulary: Allowable Target-Specific properties of integer exponents, properties of rational exponents Attributes: Non-Targeted Constructs: Accessibility Item writers should consider the following Language and Visual Guidance: Element/Design guidelines 1 when developing items. Language Key Considerations: Use simple, clear, and easy-to-understand language needed to assess the construct or aid in the understanding of the context Avoid sentences with multiple clauses Use vocabulary that is at or below grade level Avoid ambiguous or obscure words, idioms, jargon, unusual names and references Visual Elements/Design Key Considerations: Include visual elements only if the graphic is needed to assess the construct or it aids in the understanding of the context Use the simplest graphic possible with the greatest degree of contrast, and include clear, concise labels where necessary Avoid crowding of details and graphics Items are selected for a student s test according to the blueprint, which selects items based on Claims and targets, not task models. As such, careful consideration is given to making sure fully accessible items are available to cover the content of every Claim and target, even if some item formats are not fully accessible using cuent technology. 2 1 For more information, refer to the General Accessibility Guidelines at: 2 For more information about student accessibility resources and policies, refer to 2 Version.0
3 Task Model 1 single coect DOK Level 1 1. The student rewrites expressions in radical form into an equivalent expression with rational Prompt Features: Given an expression that includes radicals, identify an equivalent expression that includes rational For radicals (e.g., pp ) p may be either a number (except 0 or 1), or a variable. Item difficulty can be adjusted via these example methods, but are not limited to these methods: o Expressions can be given in pp form where p is a number (except 0 or 1). o Expressions can be given in pp form where p is a variable. o Expressions can be given in pp ss form where p is a number (except 0 or 1), or a variable. TM1a the form pp. 9 Example Stem: Select an expression that is equivalent to 6. A. 2 B. 2 C. D. 1 Rubric: (1 point) The student coectly selects the equivalent rational form (e.g., A). TM1b the form pp ss. Example Stem: Select an expression that is equivalent to xx 2. A. xx 1 B. xx 9 C. xx 1 6 D. xx 8 Rubric: (1 point) The student coectly selects the equivalent rational form (e.g., C). single coect Version.0
4 Task Model 2 single coect DOK Level 1 2. The student will be able to rewrite expressions with rational exponents into an equivalent expression in radical form. Prompt Features: Given an expression that includes rational exponents, identify an equivalent expression that includes radicals. For rational exponents (e.g., pp) p may be either: o a number (except 0 or 1), or o a multi-term expression, or o a variable with an integer coefficient. Item difficulty can be adjusted via these example methods, but are not limited to these methods: o Expressions can be given as pp where p is a number (except 0 or 1). o Expressions can be given as pp where p is a variable that may or may not have an integer coefficient. TM2a the form pp. Example Stem: Select an expression that is equivalent to A. 6 6 B. 9 C. D. Rubric: (1 point) The student coectly selects the equivalent radical form (e.g., A). single coect Version.0
5 Task Model 2 Matching Tables DOK Level 1 2. The student will be able to rewrite expressions with rational exponents into an equivalent expression in radical form. Prompt Features: Given an expression that includes rational exponents, identify an equivalent expression that includes radicals. For rational exponents (e.g., pp) p may be either: o a number (except 0 or 1), or o a multi-term expression, or o a variable with an integer coefficient. Item difficulty can be adjusted via these example methods, but are not limited to these methods: o Expressions can be given as pp where p is a number (except 0 or 1). o Expressions can be given as pp where p is a variable that may or may not have an integer coefficient. TM2b the form pp. Example Stem 1: Determine whether each expression is equivalent to xx. Select Yes or No for each expression. xx xx xx Yes No xx Example Stem 2: Determine whether each expression is equivalent to (2xx ) 2. Select Yes or No for each expression. xx 6 xx 2xx 6 xx xx xx Yes No Rubric: (1 point) The student coect identifies the equivalent expression(s) (e.g. NYNN; YNNYN) Matching Tables Version.0
6 Task Model single coect DOK Level 1. The student uses the properties of exponents to write equivalent expressions involving radicals and rational Prompt Features: Given an expression that includes radicals, identify an equivalent expression that includes rational For radicals (e.g., pp, pp tt, pp ss ), for rational exponents (e.g., pp, pp ss tt, pp mm nn ) and for complex expressions (e.g., o o o tt pp pp ss + pp mm ; pp r nn ; pp ss, pp tt pptt pp ss ) p may be either: a number (except 0 or 1), or a multi-term expression, or a variable with an integer coefficient, provided that there are no other variables in the expression. For rational exponents, n, q, or t may be a variable provided that the coesponding m, r, or s is the same variable. Item difficulty can be adjusted via these example methods, but are not limited to these methods: o p can be a number (except 0 or 1), or equation is in o pp r mm = pp ss tt form with one variable. p can be a number (except 0 or 1) or a variable with or without an integer coefficient, or equation is in pp tt pp ss = pp mm nn, or pp pp ss nn tt = pp mm form with one variable. TMa Stimulus: The student will be presented with an expression in the form pp tt pp ss. Example Stem 1: Select an expression that is equivalent to 2. A. B. 6 C. D. 6 Example Stem 2: Select an expression that is equivalent to 2xx 2 2xx. A xx 6 2 B. 2 2 xx C. 1 xx 2 D. 2xx 1 Rubric: (1 point) The student coectly selects the equivalent rational form (e.g., C; B). single coect 6 Version.0
7 Task Model single coect DOK Level 1. The student uses the properties of exponents to write equivalent expressions involving radicals and rational Prompt Features: Given an expression that includes rational exponents, identify an equivalent expression that includes radicals. Stimulus Guidelines for TMb and TMc: same as for TMa TMb Stimulus: The student will be presented with an expression in the form pp pp ss tt. Example Stem 1: Select an expression that is equivalent to A B C D. 16 Example Stem 2: Select an expression that is equivalent to 1 xx1 1. xx2 12 A. xx 2 6 B. 1 xx C xx11 D xx2 Rubric: (1 point) The student coectly selects the equivalent radical form (e.g., A; C). TMc tt the form pp( pp ss + pp mm ). Example Stem: Select an expression that is equivalent to 8 1 ( ). A B C D Rubric: (1 point) The student coectly selects the equivalent radical form (e.g., C). single coect 7 Version.0
8 Task Model single coect Equation/Numeric DOK Level 1. The student uses the properties of exponents to write equivalent expressions involving radicals and rational Version Update: Retired TMh and TMi. Prompt Features: Solve for a variable that will create equivalent expressions with radicals and rational Stimulus Guidelines for TMd - TMg: same as for TMa TMd Stimulus: The student will be presented with an equation of the form pp r mm = pp ss tt. m, q, r, s, or t may be replaced with a variable. Example Stem: Enter the value of x such that 6 1 = 6 1 xx is true. TMe Stimulus: The student will be presented with an equation in the form pp tt pp ss = pp mm nn. m, n, q, r, s, or t may be replaced with a variable. Example Stem: Enter the value of x such that 27 2 true. 27 = 27 xx is TMf Stimulus: The student will be presented with an equation in the form pp pp ss nn tt = pp mm. m, n, q, r, s, or t may be replaced with a variable. Example Stem: Enter the value of x such that xx = 7 true. is TMg Stimulus: The student will be presented with an equation of the form pp ss pptt nn = pp mm. m, n, q, r, s, or t may be replaced with a variable. Example Stem: Enter the value of x such that xx = 16 is true. Rubric: (1 point) The student enters the coect value of the variable (e.g., 12; 7; ; ). Equation/Numeric 8 Version.0
9 Task Model single coect DOK Level 2 N-RN.A.1 Explain how the definition of the meaning of rational exponents follows from extending the properties of integer exponents to those values, allowing for a notation for radicals in terms of rational. The student solves equations that require an understanding of the definitions of radicals and rational Version Update: Added new Evidence Required statement and new TMa, TMb, and TMc. Prompt Features: Solve an equation that requires an understanding of the definitions of radicals and rational Equations will be of the form xx mm = aa nn or xx mm nn = aa o m, n, and a are integers Distractors in the answer choices should reflect the standard confusion between the meaning of negative integer exponents and rational The equation has no solution should be included as an answer choice in all items in this task model, and some items should have this as the coect option. TMa Stimulus: The student will be presented with an equation of the form xx mm = aa nn. Example Stem 1: Which of the following is a solution to the equation xx = 2? A. xx = 2 B. xx = 2 C. xx = 2 2 D. xx = 2 E. This equation has no solution. Example Stem 2: Which of the following is a solution to the equation xx = 1 9? A. xx = 7 2 B. xx = 7 2 C. xx = 7 2 D. xx = 7 2 E. This equation has no solution. Example Stem : Which of the following is a solution to the equation xx 2 = 6? A. xx = 6 B. xx = 6 C. xx =18 D. xx = 18 E. This equation has no solution. Rubric: (1 point) The student selects the coect option (e.g., A; C; E). Multiple choice, single coect 9 Version.0
10 Task Model Response Types: single coect ; multiple coect DOK Level 2 N-RN.A.1 Explain how the definition of the meaning of rational exponents follows from extending the properties of integer exponents to those values, allowing for a notation for radicals in terms of rational. The student solves equations that require an understanding of the definitions of radicals and rational TMb Stimulus: The student will be presented with an equation of the form xx mm nn = aa. Example Stem: Which of the following is a solution to the equation xx =? A. xx = ( ) 1 B. xx = C. xx = 20 D. xx = E. This equation has no solution. Rubric: (1 point) The student selects the coect option (e.g., B). Multiple choice, single coect TMc Stimulus: The student will be presented with an equation of the form xx mm = aa. m and a are integers. Example Stem: Which of the following is a solution to the equation xx = 17? Select all that apply. A. xx = 17 B. xx = 17 1 C. xx = 17 D. xx = 1 17 E. This equation has no solution. Rubric: (1 point) The student selects the coect options (e.g., B, C). Multiple choice, multiple coect Version Update: Added new Evidence Required statement and new TMa, TMb, and THc. 10 Version.0
11 Task Model Response Types: multiple coect single coect DOK Level 2 N-RN.A.1 Explain how the definition of the meaning of rational exponents follows from extending the properties of integer exponents to those values, allowing for a notation for radicals in terms of rational. The student finds exact or approximate values of numeric expressions involving rational exponents or radicals. Version Update: Added new Evidence Required statement and new TMa, TMb, and TMc. Prompt Features: Students will be presented with a numeric expression involving rational exponents or radicals and will be required to find the exact or approximate value of the numeric expression. For radicals (e.g., pp ) p may be either a number (except 0 or 1) or a variable. For rational exponents (e.g., pp) p may be either: o a number (except 0 or 1), or o a multi-term expression, or o a variable with an integer coefficient. TMa nn the form aa mm xx pp and asked to identify an equivalent expression. a, m, n, and p are integers. Example Stem: Select all of the expressions that are equivalent to 100xx 6. A. 10xx B. xx 10xx C. 100xx 2 D. 2xx 1. E. 2xx 2 Rubric: (1 point) The student coectly selects the equivalent expressions (e.g., A, B, C). multiple coect TMb the form pp nn and asked to identify an equivalent expression. p is an integer n can be a fraction or decimal number Example Stem: Which number is equal to 1 2? A. 2 1 B. 2 C. 2 1 D. 1 2 Rubric: (1 point) The student coectly selects the equivalent expression (e.g., D). single coect 11 Version.0
12 Task Model Response Types: single coect DOK Level 2 N-RN.A.1 Explain how the definition of the meaning of rational exponents follows from extending the properties of integer exponents to those values, allowing for a notation for radicals in terms of rational Prompt Features: Students will be presented with a numeric expression involving rational exponents or radicals and will be required to find the exact or approximate value of the numeric expression. For radicals (e.g., pp ) p may be either a number (except 0 or 1) or a variable. For rational exponents (e.g., pp) p may be either: o a number (except 0 or 1), or o a multi-term expression, or o a variable with an integer coefficient. TMc Stimulus: The student will be presented with a segment length in radical form. Example Stem: Segment AE shown has length 20.. The student finds exact or approximate values of numeric expressions involving rational exponents or radicals. Which segment is closest in length to 10? A. AAAA B. AAAA C. AAAA D. DDDD Rubric: (1 point) The student selects the coect segment (e.g., C). single coect Version Update: Added new Evidence Required statement and new TMa, TMb, and TMc. 12 Version.0
13 Task Model 6 Response Types: multiple coect DOK Level 2 N-RN.A.1 Explain how the definition of the meaning of rational exponents follows from extending the properties of integer exponents to those values, allowing for a notation for radicals in terms of rational 6. The student compares expressions involving rational exponents or radicals with other numbers. Prompt Features: Students will be presented with a numeric expression involving rational exponents or radicals and will be required to compare the expression to other numbers. For radicals (e.g., pp ) p may be either a number (except 0 or 1) or a variable. For rational exponents (e.g., pp) p may be either: o a number (except 0 or 1), or o a multi-term expression, or o a variable with an integer coefficient. TM6 the form pp nn and asked to identify a true statement of equivalency or comparison to other numbers. p is an integer n can be a fraction or decimal number Example Stem: Select all the statements about the number 9 0. that are true. A is greater than. B is equal to.6. C raised to the fifth power equals 81. D multiplied by 10 equals 9. E is less than 0.9 Rubric: (1 point) The student coectly selects the true statements (e.g., B, E). multiple coect Version Update: Added new Evidence Required statement 6 and new TM6. 1 Version.0
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