Washington — Mathematics — Grade 8 — Summative Assessment (SBA)
Practice test built to the official Washington Mathematics assessment blueprint for Grade 8 — same domains, same weighting, instant scoring with an explanation for every question.
Content updated September 2026
- Built to the real blueprintSame domains at the same weight as the official test.
- Every answer explainedInstant scoring, with the reasoning for each question.
- Miss it, master itWrong answers come back as a short scored practice set until you fix them.
- 47
- Questions
- 120
- Minutes
- 33/ 47
- Qualifying score
- No negative marking
- On-screen calculator
- Question formats
- Selected Response (Multiple Choice)
- Constructed Response (Short Answer)
- Technology Enhanced
- Performance Task
What’s on the test
The 47 questions mirror the official blueprint below — every domain appears at its real weight, so your score predicts readiness for the actual administration.
Washington — Mathematics — Grade 8 — Summative Assessment (SBA)
This summative assessment measures student proficiency in Grade 8 mathematics as outlined by Washington state standards. It evaluates understanding across key domains including number systems, expressions and equations, functions, and geometry with statistics. The test consists of 40 items designed to assess both conceptual knowledge and procedural skills.
| Content Standard | Items | Percentage |
|---|---|---|
| The Number System | 8 | 20% |
| Expressions and Equations | 8 | 20% |
| Functions | 8 | 20% |
| Geometry and Statistics | 8 | 20% |
| Total | 40 | 100% |
Frequently asked questions
How many questions are on this Mathematics practice test?
This practice test has 47 questions (selected response (multiple choice), constructed response (short answer), technology enhanced, performance task), matched to the domains and weights of the official blueprint shown above.
How long is the test?
You get 120 minutes, with a live countdown timer on screen — the same time pressure as a real computer-based administration.
Is there negative marking?
No — there is no negative marking on this practice test, so it always pays to attempt every question.
What score counts as passing?
The qualifying score on this practice test is 33 of 47 marks. Your report shows your score and a question-by-question breakdown with explanations the moment you submit.
Can you use a calculator?
Yes — an on-screen calculator is built into the test player, the same way computer-based state assessments provide one.
How do I start, and what does it cost?
Scroll down and press Start — the test runs right on this page, and scoring is instant. Preview questions are free; full-length attempts with detailed score reports are part of a PrepGro plan.
Ready to see where you stand?
The test runs right below — instant score, every answer explained.