What a math rubric must measure, not just describe
Friday’s Algebra I modeling task asks students to fit a quadratic to data, explain the choice, and interpret intercepts. That requires more than a generic “excellent/satisfactory” grid. A math rubric needs dimensions that reflect math work itself: Strategy & Modeling (selects a reasonable model and justifies it with features of the data), Accuracy (correct computations, reasonable parameters), Representation (clearly labeled graphs, units on axes, appropriate scale), and Communication (explains steps using properties or theorems, connects math to the context).
Quality shows up in the level descriptors. “Proficient” might read, “Chooses quadratic; cites curvature and residual pattern; parameters computed with at most one minor slip; graph labeled with units; justification references vertex and intercepts.” Avoid vague verbs (“understands,” “knows”) and anchor each level to observable math actions: shows work, names a property, labels a diagram, states a unit, checks reasonableness.
Start with a task and requested dimensions, then open a rubric draft that includes 3–4 levels with concise, student-facing language. In ClassPods, you can keep the math focus tight: reward correct reasoning even when a computation slips, and reserve “Exceeds” for mathematically stronger choices (e.g., residual analysis, sensitivity check).