About this book
Give your third grader the confidence to succeed on Ohio's State Test (OST) Grade 3 Mathematics.
This Smart Stars practice book provides five full-length, standards-aligned practice tests that mirror the length, item mix, and question types of the real OST in Mathematics. Every question was written by experienced educators, reviewed for accuracy, and built around Ohio’s Learning Standards for Mathematics at Grade 3 — the standards Ohio built the test on — so the topics and emphasis match what Ohio students actually see.
Take a look inside
Ohio’s State Tests (OST) are the tests the Ohio Department of Education and Workforce gives to students statewide, delivered online through Cambium Assessment.
- Format: unlike an adaptive test, the OST is a fixed-form test — every student sees the same questions — and the spring administration is the one that counts toward grade-level results.
- Tools at Grade 3: no calculator.
- Question types: single-answer multiple choice, multiple-select (“select the two”), type-in/equation answers, two-part questions, and figure-based items.
- Each practice test here: 53 questions per test, 265 across the book — to build true test-day endurance.
What’s inside
- Five full-length practice tests, with detailed Answers and Explanations after every test
- Coverage of all four Grade 3 math reporting categories Ohio uses: Multiplication and Division (the largest, 23 to 33 percent of the test), Number and Operations, Geometry, and Fractions
- Practice in every OST item format rendered for paper: multiple choice, multiple select (“select two” or “select three”), type-in/equation answers, two-part (Part A / Part B) questions, number lines, line plots, area and composite-figure models, clocks, bar and picture graphs, and fraction and array models
- A Quick Answer Key after each test for fast self-grading
- A family letter, a test-taking tips section, and a Grade 3 math conversions reference chart before each test — included as a study aid
- No-calculator practice throughout, matching the official OST Grade 3 policy
Topics covered
- Place value, and reading, writing, comparing, and rounding whole numbers within 1,000, including standard and expanded form
- Adding and subtracting whole numbers within 1,000, with and without regrouping, and missing-number problems
- Understanding multiplication and division within 100 through arrays, equal groups, repeated addition, and number lines, and the way multiplication and division undo each other
- “Times as many” multiplicative comparison, and multiplying one-digit numbers by multiples of ten
- Fractions as numbers: unit fractions, fractions of a whole, fractions on a number line, equivalent fractions, whole numbers written as fractions, and comparing fractions with the same numerator or the same denominator (halves, thirds, fourths, sixths, and eighths)
- Sorting and classifying quadrilaterals — squares, rectangles, and rhombuses — and how they relate
- Perimeter of polygons, including finding an unknown side and composite (L-shaped) figures
- Area of a rectangle by tiling with unit squares and by multiplying side lengths, including composite rectangles
- Telling and writing time to the minute, and finding elapsed time
- Reading and building scaled picture graphs and bar graphs, and line plots marked in halves and quarters
- Analyzing data to answer “how many more,” combine-and-compare, and two-part 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 OST shape, item mix, question formats, and no-calculator policy.
- Built for Ohio: Aligned to Ohio’s Learning Standards for Mathematics at Grade 3, with grade-appropriate real-world contexts and a diverse cast of student names.
- Explanations teach the why: Every Answers and Explanations entry shows the full worked solution, then a labeled closing Tip, Check, or Estimate (and a Strategy on multi-step problems) so students learn the reasoning.
- Varied and graduated: Slot positions, contexts, names, and number choices rotate test-to-test, and the later tests lean on more multi-step, multi-select, and two-part reasoning — so no two feel like the same practice run.
