About this book
Give your fourth grader the confidence to succeed on the Ohio's State Test (OST) Mathematics assessment.
This book contains five full-length practice tests — 270 questions total — aligned to Ohio’s Learning Standards for Grade 4 Mathematics and designed to match the format, difficulty, and content of the real Grade 4 OST exam. (This includes unscored field-test items that appear on the actual OST exam, so each practice test mirrors the true 54-item on-screen length and helps your child build real-world test “endurance” for the full sitting.)
Take a look inside
On test day: Ohio gives the Grade 4 Mathematics test in two Parts of about 75 minutes each, with no calculator.
What’s inside
- 5 complete 54-question practice tests (270 questions total)
- Two-part format mirroring test day: Part 1 (27 items, ~75 minutes) and Part 2 (27 items, ~75 minutes), no calculator (matches OST policy for Grades 3–5)
- A reference sheet at the front of every test with the same metric conversions and prefix chart that students see on the on-screen OST tool
- Multiple-choice, multi-select (with the count named, exactly like the real test), and gridded-response equation items — the same interaction types Ohio uses on the online platform
- Detailed answer explanations for every question — not just the correct letter, but step-by-step reasoning that builds real understanding, plus a labeled Strategy and Tip line for every item so your child learns the move and the why
- Item types, names, and contexts varied across all 5 tests, so students never see the same problem twice in the same slot
- Reporting categories grouped exactly as on the official test: Multiplication and Division, Fractions, and Geometry (with Modeling and Reasoning embedded across all three)
- A parent letter with test-taking tips, plus a note that your student will need a physical protractor for the angle-measurement items (the real test provides an on-screen protractor; we print unlabeled protractors so students practice measuring with a real one)
- A quick-reference answer key for all five tests for fast scoring
Topics covered
- Place value and the 10-times relationship between adjacent places, through 1,000,000
- Reading, writing, and comparing multi-digit whole numbers in standard, word, and expanded form
- Rounding multi-digit whole numbers to any place through hundred-thousands
- Multi-digit addition and subtraction using a standard algorithm
- Multiplication: up to 4-digit by 1-digit and 2-digit by 2-digit
- Division: 4-digit dividends by 1-digit divisors, with and without remainders
- Interpreting remainders in multistep word problems
- Multiplicative comparison — “X times as many as” problems
- Factors, multiples, prime, and composite numbers within 1–100
- Generating and analyzing one-step number and shape patterns
- Equivalent fractions and ordering with denominators 2, 3, 4, 5, 6, 8, 10, 12, and 100
- Comparing fractions with different numerators and denominators using benchmark fractions
- Adding and subtracting fractions and mixed numbers with like denominators (including regrouping)
- Multiplying a fraction by a whole number
- Decimal notation for fractions in tenths and hundredths; comparing decimals
- Adding fractions with denominators of 10 and 100
- Solving real-world problems with money (with decimal notation), time (including elapsed time over 90 minutes), and metric measurement
- Metric conversions: kilometers ↔ meters, meters ↔ centimeters, centimeters ↔ millimeters, kilograms ↔ grams, liters ↔ milliliters
- Area and perimeter of rectangles in real-world contexts
- Line plots with halves, quarters, tenths, and hundredths
- Lines, line segments, rays, and angles (acute, right, and obtuse), with parallel and perpendicular lines in two-dimensional figures
- Measuring and sketching angles in whole-number degrees using a protractor
- Additive angle measure — finding unknown angles when an angle is split into parts
- Classifying two-dimensional figures by parallel sides, perpendicular sides, and angle types
Why parents and teachers choose Smart Stars
- Written by experienced educators who study Ohio’s official OST specifications and released items
- Every question mirrors what students will see on test day — no surprises in format, content, or rigor
- Explanations teach the “why,” not just the “what,” so students learn from every mistake — every item ends with a labeled Strategy and Tip line tied to the specific sub-skill
- Item types and contexts varied across the five tests — just like a real exam, every question feels fresh
- Difficulty ramps gently across the five tests (Test 1 closest to a typical operational form; Test 5 stretches your student with more multistep word problems and larger numbers), so the book is also a study path, not just five identical run-throughs
