FrameworkWashington is a member of the Smarter Balanced Assessment Consortium and administers the consortium's summative mathematics assessment (OSPI calls it the SBA) as its accountability test. Math is organized into the four Smarter Balanced claims with published assessment targets (Mathematics Content Specifications). Claim 1 (Concepts and Procedures) publishes per-grade assessment targets for grades 3-8 and high school, each a verbatim CCSS-M cluster heading (e.g. grade 3 Target A is cluster 3.OA.A); Claims 2-4 are cross-cutting process claims whose targets are constant across grades and draw on the same grade-level content. On score reports, Claims 2 and 4 are combined into a single reporting category, so three claim scores accompany the overall math score. Unlike most consortium states, Washington administers the high school test in grade 10 (moved from grade 11 by ESHB 2224, with grade 10 cut scores adopted in January 2018).
Blueprint & weightingContent Specifications (Reporting Categories section): the total mathematics score is a weighted composite of the four claims — Claim 1 (Concepts and Procedures) contributes roughly 50%, Claim 3 (Communicating Reasoning) roughly 25%, and combined Claims 2 and 4 (Problem Solving / Modeling and Data Analysis) about 25%. The summative blueprint (as of 2018-19) publishes item counts per test event rather than percentages: Claim 1 is 17-20 items in grades 3-5, 16-20 in grades 6-8, and 19-22 on the high school test; the Claim 2/4 and Claim 3 reporting categories are 8-10 items each, totaling 18-20 across the two. Smarter Balanced reports Claims 2 and 4 together as a single subscore because they are described as intertwined in the technical report.
Official sourcesWashington OSPI – Smarter Balanced Assessment
Washington OSPI – State Testing (SBA ELA and math in grades 3-8 and 10)
Washington OSPI – Mathematics Assessment (claims documents and per-grade claim distributions)