Ost by Lumos Learning Ohio State Test Prep: 4th Grade Math Practice Workbook and Full-length Online Assessments: OST Study Guide, Book 3, (Paperback)

Lumos' Ohio OST blended program (Workbook + Online Access) helps your child improve scores by 10% or more* in the 2025-26 OST assessment through realistic test simulations, targeted skills practice, and AI-powered intervention.

This blended program includes:

• Practice questions covering 30+ Grade 4 math skills in pen and paper format
• Answer keys with detailed explanations in the workbook
• 2 full-length online practice tests that simulate Ohio's OST
• Personalized online study plan for targeted practice
• AI Tutor for clear step-by-step explanations, hints, and instant feedback
• Online program access code

Trusted by over 1.6 Million students and 200,000 teachers.

Reduce your child's OST test anxiety using Lumos' Smart Test Prep Methodology

Lumos' Smart Test Prep Methodology blends realistic Ohio test simulations, personalized guidance, and targeted practice to help students get ready for the state test.

Students begin with a simulated OST test, follow an AI-personalized study plan, practice essential skills, and repeat the cycle-steadily building the skills and confidence they need for the Spring OST.

Why is Lumos' OST Practice Workbook the Smart Choice for 2025-26?

• Realistic Practice Tests: Two full-length tests that simulate OST format, question types, rigor, standards, and pacing
• Personalized Study Plan: Online Diagnostic Tests generate a personalized study plan for targeted skills practice using the workbook
• Lumos AI Tutor: A built-in, on-demand AI coach that delivers real-time assistance just like a personal tutor
• Online Program Access: Features guided practice questions, solved examples, a performance insights dashboard, videos, mind maps, flashcubes, and other engaging test prep resources

Why Parents Trust Lumos tedBook for Ohio OST Success?

Lumos has a history of delivering measurable results. Its realistic test preparation builds confidence, and the performance reports offer clear insights into strengths and areas for improvement. With Lumos tedBook, families feel assured that their child is fully prepared to succeed on the Ohio state assessment.

"This book is awesome-I've bought it two years in a row. We used it to study for the OST Math in 3rd grade and the OST Math in 4th grade, and my child aced both tests with a score of 4. The online resources that come with the book are amazing. Kids can practice online tests and individual lessons as many times as they want." - Jessenia

How Do Teachers Use Lumos tedBook in Their Classroom?