The following multiple-select question, explained here in hopes of helping eighth-grade students and their parents in Maryland and Illinois prepare for the PARCC test near the end of this school year, appears on the released version of PARCC’s Spring 2016 test for grade eight math:
Which expression is equivalent to ?
Select each correct answer.
Analysis of this question and online accessibility
Integer exponents with numerical bases are new for eighth graders under the Common Core. Students should know how to work with positive and negative exponents of a numerical base (fraction or integer), as well as with exponents that are themselves expressions.
- Rules for exponents, with examples, from Landmark College in Vermont
- A similar page from Mesa Community College in Arizona
- Exponent rules from Elizabeth Stapel at Purple Math
Multiple-choice questions like this can be delivered easily online and on paper-based tests, which makes this question accessible for students on any device they may use or on paper. Validity, reliability, and fairness measures should not differ significantly among the various delivery modes.
No special accommodation challenges can be identified with this question, so the question is considered fair.