CMAS Test Prep: 3rd Grade Math Practice Workbook and Full-length Online Assessments: Colorado Measures of Academic Success Study Guide (CMAS by Lumos Learning)

Give Your Child an Edge on the 2025 CMAS!

Prepare them to excel in the Colorado state assessments with confidence and ease.

Designed by CMAS experts, the Lumos Learning 3rd Grade Math Practice Workbook is crafted to boost your child’s test scores by 10-15 points. Featuring hundreds of practice questions fully aligned with Colorado’s C.A.S standards, realistic online practice tests, and personalized learning paths, this workbook is tailored to your child’s needs.

What's New in the 2024-25 Lumos CMAS Grade 3 Math Workbook?

Introducing Lumos AI Tutor: Get personalized guided support with step-by-step explanations, helpful hints, and tailored feedback—just like having a teacher at home! Try it today with your workbook.

Comprehensive CMAS Prep with 3rd Grade Math Practice Questions

• Expert-Designed Practice: Hundreds of carefully crafted questions aligned with the CMAS test, available in both print and digital formats, covering every essential math concept.


• Comprehensive Coverage: The workbook addresses 25 math skills, including Operations and Algebraic Thinking, Number & Operations in Base Ten, Number & Operations – Fractions, Measurement & Data and Geometry.


• Realistic Practice Tests: Prepare your child with two full-length practice tests that mirror the exact format and difficulty level of the CMAS exam, helping them build confidence for test day.


• Personalized Study Plan: Based on your child’s performance in the online practice tests, receive a personalized study plan, guiding them through targeted remedial practice using the physical workbook.


• Lumos AI Tutor: Acting as a personal coach, the AI Tutor provides step-by-step guidance, hints, and real-time feedback to keep your child on track and engaged during practice.


• Progress Tracking: Compare your child’s progress with their peers using easy-to-read performance reports, allowing you to address any learning gaps early.

Exclusive Print & Digital Resources

What’s Included in the Printed Workbook?

1. Five chapters covering all Colorado Math standards
2. Answer keys with detailed explanations

Exclusive Online Resources

1. Two full-length practice tests mirroring the 2025 CMAS exam
2. Personalized study plans for targeted remedial practice
3. Engaging test prep resources such as guided practice questions, solved examples, videos, mind maps, flashcubes, and more
4. A user-friendly dashboard with detailed performance reports
5. Lumos AI Tutor for personalized support during practice

Why Parents Trust Lumos tedBook for Colorado State Tests

With over 17 years of experience, Lumos Learning has helped more than 1.3 million students, 164,600 teachers, and 58,100 schools improve their test outcomes. Our Smart Test Prep Methodology ensures your child is fully prepared for the 2025 CMAS.

A Workbook Designed for Year-Round Learning

Whether for classroom instruction, at-home practice, homeschooling, or tutoring, the Lumos CMAS Math Workbook provides an engaging and effective way to prepare for the Colorado state tests.

Don’t wait—give your child the advantage they need for the 2025 CMAS with the Lumos tedBook. Order today and start preparing for success!