


Word Roots Level 4
Decode tricky words, strengthen comprehension, and write with clarity—Word Roots Level 4 turns Latin and Greek roots into lasting language skills your teen will use across every subject.
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2026 Tenth-Grade Curriculum Kit
Word Roots Level 4
Word Roots Level 4 takes vocabulary study beyond memorization and into true word mastery. Designed for older students, this advanced level teaches how Greek and Latin roots, prefixes, and suffixes work together to form the sophisticated vocabulary found in upper-level literature, science, history, standardized tests, and college-preparatory coursework.
This 288-page workbook covers an impressive 45 prefixes, 220 roots, 117 suffixes, and 363 vocabulary words. Rather than asking students to memorize long lists of definitions, it equips them with a system for decoding unfamiliar words independently—a skill that becomes increasingly valuable as academic reading grows more challenging.
Lessons guide students through defining word parts, spelling and defining vocabulary words, applying words in context, and using newly learned vocabulary in writing. Periodic review sections reinforce previous material and help students retain what they have learned over the long term.
By this level, students often begin recognizing roots across multiple subjects. A challenging science term, an unfamiliar literary word, or a difficult SAT-style vocabulary question becomes far less intimidating when they can identify familiar components and use them to determine meaning.
The workbook includes a pretest, posttest, review sections, a comprehensive dictionary of roots, prefixes, suffixes, and vocabulary words, along with a complete answer key. Reproducible pages make the program practical for families teaching multiple students.
Students who complete Word Roots Level 4 gain more than an expanded vocabulary. They develop a deeper understanding of how language works, stronger reading comprehension, improved spelling, and greater confidence when encountering complex academic language. The writing activities may also count toward one-quarter of high school composition credit.

How to Use Word Roots Level 4
- Begin with the first lesson and work through the workbook in order. Because concepts build on previously learned roots and affixes, students benefit from completing the lessons sequentially rather than jumping ahead.
- Plan on completing two to three assignments each week. At that pace, most students will finish the course comfortably within a traditional school year while leaving room for reviews, breaks, and occasional catch-up weeks.
- Encourage your teen to complete every portion of each lesson, including the sentence-writing activities. Applying vocabulary in context is one of the most effective ways to strengthen retention and move new words from recognition to active use.
- Take advantage of the review sections as they appear. These lessons help reinforce previously learned roots, prefixes, and suffixes and provide valuable opportunities to identify areas that may need additional attention.
- Use the posttest at the end of the course to measure growth. Students are often surprised by how many unfamiliar words they can now decode simply by recognizing the word parts within them.
By the end of the workbook, students will have worked with 45 prefixes, 220 roots, 117 suffixes, and 363 vocabulary words while strengthening reading comprehension, writing skills, and vocabulary development. The writing activities may also count toward one-quarter of a high school composition credit.
In the 2026 kits this course earns high school credit:
0.25 credits of Vocabulary & Etymology II
Language Arts · 10th grade · Classic and Non-Religious kits
View Sample Pages here
Answers are located in the back of this book.
Publisher's Information
Publisher: The Critical Thinking Co™
Author: Cherie A. Plant
Age Recommendation: 12+
Grade Recommendation: 7th+
Faith-Based: No
Consumable: Yes (can be reproduced in your own home or classroom, but not for any commercial entity or organization)
Pages: 336, perforated
ISBN: 9781601446749
Format: Softcover
Awards and Endorsements from:
review by Chocolate Covered Boy Joy
”If your child enjoys sleuth work, he may enjoy Word Roots.”
Read the ReviewFind answers to the most frequently asked questions about this product below:
Word Roots 3 and Word Roots 4 are each typically counted as 1/4 credit in English/Language Arts for high school students.
Yes. It can be reproduced in your own home or classroom, but not for any commercial entity or organization.
Word Roots Level 4 counts as a quarter credit of Vocabulary & Etymology II on a high school transcript. To turn its grade into a GPA, use our free homeschool GPA calculator: it works out each letter grade from your student's scores, figures the GPA by year and for all of high school, and prints a grade record for the transcript.


- June 8, 2026
twoblue30
Great little book if your student need help with grammar. My student used it as a refresher course!
- March 6, 2026
Great addition to ELA
Steph H.
Word Roots is a great student-led study of prefixes, suffixes and roots. Word study, vocabulary and spelling help round out the ELA curriculum. I appreciate this addition to our language arts study for the school year.
- August 14, 2020
Great
Rachel
We love the Word Roots series and have been using them for the last several years. It teaches not only spelling but helps our daughter learn new words and their meanings. Great part of her English subject!
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