About this book
Give your fourth grader the confidence to succeed on the Oregon OSAS Grade 4 Math test.
This Smart Stars practice book provides five full-length, standards-aligned practice tests that mirror the on-screen length and item mix of the real Oregon Statewide Assessment System (OSAS) in Mathematics. Every question was written by experienced educators, reviewed for accuracy, and built around the 2021 Oregon K–12 Mathematics Standards at Grade 4.
Take a look inside
The OSAS Math test is built on Smarter Balanced and delivered online through the state’s testing platform.
- Format: an untimed test that combines a computer-adaptive section with a Performance Task.
- Question types: multiple-choice, multiple-select, technology-enhanced, and type-in items.
- Tools at Grade 4: no calculator.
- Each practice test here: the real test’s shape — a set of computer-adaptive-style items plus a multi-part Performance Task, about 23 to 25 items per test (over 115 items in all) — to build true test-day endurance.
What’s inside
- Five full-length practice tests, each with a multi-part Performance Task, and detailed Answers and Explanations after every test
- Coverage of every Grade 4 math standard across the four OSAS claims: Concepts and Procedures; Problem Solving; Communicating Reasoning; and Modeling and Data Analysis
- Dedicated practice for Oregon’s Data Reasoning items — interpreting data and answering investigative questions, the piece that sets OSAS apart from a generic Common Core test
- Practice in every OSAS item format: multiple choice, multiple select, type-in answers, True/False matching tables, number lines, line plots, bar graphs, pictographs, tally charts, two-way tables, area models, and figure-based geometry questions
- A combined Quick Answer Key at the back of the book for fast self-grading
- A family letter, a test-taking tips section, and a math reference/study page before each test
- No-calculator practice throughout, matching the official OSAS Grade 4 policy
Topics covered
- Place value through the hundred-thousands, and reading, writing, comparing, and rounding multi-digit whole numbers
- Multi-digit addition and subtraction, with regrouping and estimation
- Multiplication of up to four-digit by one-digit and two-digit by two-digit numbers, using area models and partial products
- Division with one-digit divisors, including interpreting remainders
- Multiplicative comparison (“times as many”), and writing equations to match a comparison
- Factors, multiples, and prime and composite numbers
- Number and shape patterns and the rules behind them
- Fraction equivalence and comparison; adding and subtracting fractions and mixed numbers with like denominators; multiplying a fraction by a whole number
- Decimal notation for tenths and hundredths, and comparing decimals
- Measurement and unit conversion, money, and multi-step word problems
- Area and perimeter, including composite (L-shaped) figures and finding a missing side
- Angles: measuring, adding angle measures, and classifying; parallel and perpendicular lines; lines of symmetry; classifying shapes
- Line plots in fractional units, bar graphs, pictographs, tally charts, and two-way tables
- Oregon Data Reasoning: reading data displays and answering investigative questions
Why parents and teachers choose Smart Stars
- Educator-authored: Every question is written and reviewed by classroom-experienced educators.
- Mirrors test day: Each practice test matches the official OSAS format, item mix, and policy — a computer-adaptive-style section plus a Performance Task, and no calculator at Grade 4.
- Built for Oregon: Includes the Data Reasoning items and investigative questions unique to the Oregon standards, plus Oregon-flavored contexts — salmon, the coast, orchards, and local wildlife.
- Explanations teach the why: Every Answers and Explanations entry shows the full worked solution, then a labeled Strategy and a closing Tip, Check, or Estimate so students learn the reasoning.
- Varied across five tests: Slot positions, contexts, names, and number choices rotate test-to-test, and the tests step up in difficulty so no two feel like the same practice run.
