ARM 10.54.4106. GRADE 8 PERFORMANCE DESCRIPTORS AT THE PROFICIENT LEVEL

(1) An eighth-grade student at the proficient level in mathematics demonstrates solid academic performance. He/she gives responses that exhibit clear understanding of the problem or situation presented and is able to make connections within the mathematical and/or real world. The student can determine a process, and sufficiently communicate correct problem solving strategies through relevant representations. Although there may be occasional errors, these do not interfere with appropriate strategies. Solutions are reasonable and well-supported. (a) The student demonstrates these abilities under content standard 1 in the areas of: (i) rational number relationships; (ii) estimation and reasonableness; (iii) number theory; (iv) rational number operations; (v) metric and standard measurement; and (vi) proportional reasoning. (b) The student demonstrates these abilities under content standard 2 in the areas of: (i) representing and comparing data; (ii) evaluating data and making conjectures; and (iii) finding probability and predicting. (c) The student demonstrates these abilities under content standard 3 in the areas of: (i) properties of solids and figures; (ii) congruence and similarity; (iii) transformations including dilations; (iv) angles, surface area, and volume; and (v) justifying relationships. (d) The student demonstrates these abilities under content standard 4 in the areas of: (i) representing and generalizing patterns; (ii) linear functions; (iii) multi-step equations and inequalities; (iv) equivalent algebraic expressions; and (v) linear modeling.