iRubric: Expressions and Equations rubric

edit print share Copy to my rubrics Bookmark test run assess... delete Do more...

Expressions and Equations

Students complete tasks that are linked to demonstrating an understanding of equivalent expressions as they apply to writing expressions in standard and factored form. Students also interpret solutions in the context of problems.

Rubric Code: XX7C26W

By logan219

Ready to use

Public Rubric

Subject: Math

Type: Assessment

Grade Levels: 6-8

Task and Description
	Below Standards Student demonstrates a limited understanding of writing the expression in standard form. OR Student makes a conceptual error, such as dropping the parentheses or adding instead of multiplying. 25 pts	Approaching Standards Missing or incorrect answer but evidence of some reasoning or application of mathematics to solve the problem Student makes two or more computational errors. 25 pts	Meeting Standards Student demonstrates a solid understanding but makes one computational error and completes the question by writing a correct equivalent expression in standard form. OR Student answers correctly, but no further correct work is shown. 25 pts	Exceeding Standards Student writes the expression correctly in standard form, 4x+2y. Student shows appropriate work, such as using the distributive property and collecting like terms. 25 pts
Writing Equivalent Expressions	Below Standards Identifying the corresponding sides has been computed incorrectly Determining the set-up of the correct ratio.	Approaching Standards Computational errors. missing or incorrect answer but evidence of some reasoning or application was used to solve the problem	Meeting Standards Student demonstrates a solid understanding but makes one computational error and completes the question by writing a correct equivalent expression in standard form.	Exceeding Standards Student writes the expression correctly in standard form, 4x+2y. Student shows appropriate work, such as using the distributive property and collecting like terms.
Factoring Expressions	Below Standards Student demonstrates a limited understanding of writing the expression in factored form.	Approaching Standards Student writes the expression correctly in factored form but has part (a) incorrect.	Meeting Standards Student demonstrates a solid understanding by writing a correct equivalent expression in factored form based on the answer from part (a) but makes one computational error	Exceeding Standards Student uses the correct expression from part (a). Student writes an equivalent expression in factored form.
Understanding Area and Perimeter	Below Standards Student demonstrates a limited understanding of perimeter by finding three sides of a triangle whose sum is 25, but the sides are incorrect and do not satisfy the given conditions.	Approaching Standards Students understand the criteria and logical reasoning behind placing labels on diagrams but omits at least two or more labels and or geometry symbols.	Meeting Standards Student sets up and solves an equation correctly but does not substitute the value back into the expressions to determine the actual side lengths.	Exceeding Standards Student correctly defines the variable, sets up an equation to represent the perimeter, such as 2x+x+x+6=25, solves the equation correctly, x=4 3/4 , and determines the lengths of the three sides to be 4 3/4, 9 1/2, and 10 3/4.
Using Expression to find Area	Below Standards Student makes a conceptual error, such as finding the perimeter, and makes two or more computational errors, without finding the length.	Approaching Standards Student writes a correct equation demonstrating area, but makes a conceptual error, such as finding perimeter instead of area.	Meeting Standards Student finds the correct value of x. For example, student sets up the following equation of equal difficulty: 3 2/5+3 2/5+x+3+x+3=15 3/10; student solves the equation correctly, x=1 1/4;	Exceeding Standards Student correctly defines the variable, sets up an equation to represent the area, such as 3 2/5 (x+3)=15 3/10, solves the equation correctly, x=1 1/2, and determines the length to be 4 1/2 inches.
Solving problems Arithmetically	Below Standards Student demonstrates little or no understanding between an arithmetic and an algebraic approach.	Approaching Standards Student recognizes the solutions are the same. OR Student recognizes the operations are the same.	Meeting Standards Student recognizes the solutions are the same. AND Student recognizes the operations are the same.	Exceeding Standards Student recognizes the solutions, the operations, and the order of the operations are the same between an arithmetic and an algebraic approach.

Keywords:

Equation, Equivalent Expressions, factor, Distributive Property, Commutative and Associative Property.

Subjects:

Math

Types:

Discuss this rubric