Teaching root words and affixes to students with IEPs

By the IEP Atlas editorial teamLast updated November 1, 2026

Short answer

Teach root words by starting with common prefixes and suffixes, then moving to Latin and Greek roots in word families. In each lesson, name the part and its meaning, build and break words with it, check meanings in context, and add the words to a family chart. Students learn to split an unknown word into parts and guess its meaning.

Students who know that "rupt" means break can make a good guess at "erupt," "disrupt" and "interrupt" without being taught each one. That is the payoff of teaching word parts, or morphology: one part opens up a whole family of words. For students with reading disabilities, word parts also make long words easier to decode, because a 4-syllable word becomes 2 or 3 familiar chunks.

The steps below each include an example, and the worked example follows one fictional 6th grader for 10 weeks. Numbers are illustrations. For how vocabulary connects to comprehension, see the cluster pillar on reading comprehension strategies.

What the research guides say

The What Works Clearinghouse guide for grades 4 to 9 recommends building students' skill at reading complex multisyllabic words, including breaking words into parts, and building word knowledge as part of comprehension lessons.^[1] The adolescent literacy guide recommends explicit vocabulary instruction, which includes teaching students strategies to work out word meanings on their own.^[2]

A sequence of word parts

Teach in this rough order. Each group builds on the one before.

Stage	Parts	Examples
1. Inflectional endings	-s, -es, -ed, -ing	jumps, boxes, jumped, jumping
2. Common prefixes	un-, re-, dis-, pre-, mis-, non-	undo, redo, dislike, preview, misread, nonstop
3. Common suffixes	-ful, -less, -ly, -er, -est, -ness, -able	careful, careless, quickly, teacher, kindness, readable
4. Suffixes that change the part of speech	-tion, -ment, -ity, -ive, -ize	action, movement, ability, active, organize
5. Latin roots	rupt, port, struct, dict, spect, tract, scrib or script, ject	erupt, transport, construct, predict, inspect, tractor, describe, reject
6. Greek parts	bio, geo, graph, tele, photo, micro, therm, -ology	biology, geography, telephone, microscope, thermometer
7. Prefixes with spelling changes	in-, im-, il-, ir-	incorrect, impossible, illegal, irregular

Stages 1 to 3 fit grades 2 to 4. Roots usually start in grade 4 or 5 and continue through high school, where science and social studies texts are full of them.

What you need before you start

Word cards for the part and for 6 to 10 words that use it.
A word family chart on the wall or in a notebook: the part, its meaning, the words.
Sentences using each word, for the context check.
A probe list of 10 unfamiliar words built from taught parts.

The 5-step root word lesson

Step 1: Name the part and its meaning

Show the part and give the meaning in plain words. "Port means carry." Show 1 picture or gesture if you can: mime carrying a box. Say it, have students say it, and write it on the family chart.

Step 2: Build words with the part

Combine the part with known prefixes and suffixes. "Trans means across. Trans plus port: transport, carry across." Add "portable," "import," "export," "porter." Students say each word and the meaning it is built from.

Step 3: Break words apart

Reverse the process. Give students words and have them split them with a slash and label each part: "ex / port / ed: out, carry, past tense." This is the skill they will use on unfamiliar words.

Step 4: Check the meaning in context

Word parts give a guess, not a guarantee. Read each word in a sentence and ask whether the parts-based meaning fits. "The ships export grain. Does 'carry out' make sense here?" Also teach that some words fool you: "report" does not mean carry again, and "important" has only a distant link to carrying. Context always wins.

Step 5: Add to the family chart and review

Each new word goes on the family chart. Start the next lesson with a 3-minute mixed review of earlier parts. Students who see "rupt," "port" and "struct" together every week learn to look for parts automatically.

Worked example: one student across 10 weeks

Student (fictional): Zoe, grade 6, specific learning disability in reading. Reads grade 4 text with 95% accuracy but stalls on long words in science, often skipping them.

Baseline, October 20 to 24. Three probes, each 10 unfamiliar words built from parts Zoe would be taught (for example, "inspector," "disruptive," "transportable"). Zoe was asked to split each word and give a meaning from the parts. Scores: 1, 2 and 1 of 10. Median 1 of 10.

Goal. Given 10 unfamiliar words built from taught prefixes, suffixes and roots, Zoe will divide each word into its parts and give a meaning that fits the parts for 8 of 10 words on 3 consecutive weekly probes. See the template to use prefixes, suffixes and roots to find meaning and, for older students, to define an academic word from its parts.

Instruction. Four 15-minute lessons a week. Two new parts a week, starting with the prefixes in stage 2 and moving to Latin roots by week 4.

Week	Parts taught so far	Probe score (of 10)	Notes
Baseline	0	1	Skipped most words
2	4 prefixes	3	Split prefixes well, guessed roots
4	4 prefixes, 4 suffixes	5
6	Plus rupt, port, struct	6	Over-applied "port" to "report"
8	Plus dict, spect, tract	8	Context check added each lesson
9	Same	8
10	Plus scrib, ject	9	Third probe at criterion

Zoe's science teacher also noticed fewer skipped words. In week 10, Zoe read a grade 6 science passage aloud and attempted 9 of 11 multisyllabic words, up from 3 of 11 in October.

How to measure it

Use percent accuracy on 10 unfamiliar words built from taught parts, probed weekly. Score 1 point for a correct split and 1 for a meaning that fits the parts, so a probe is out of 20, or count only words with both parts right, as in Zoe's goal. Record each probe on an accuracy data sheet. The vocabulary assessment guide covers other formats.

Common mistakes

Weak: Memorizing a list of 50 roots with meanings. Better: Teach 2 parts a week and build word families with each.
Weak: Testing only the meaning of the root ("What does spect mean?"). Better: Test unfamiliar whole words. Knowing the root is useless unless the student uses it on new words.
Weak: Teaching roots with words the student cannot decode. Better: Start with words the student can read, or read them aloud first.
Weak: Ignoring false friends like "report" and "uncle." Better: Teach the context check in Step 4 from the start.
Weak: A goal that says "will learn Greek and Latin roots." Better: Name the words, the task and the count, as in Zoe's goal.

Root work connects to multiple-meaning words and to academic vocabulary, much of which is built from Latin and Greek parts. For word families as a goal, see the templates to sort words into Latin root families and to use Greek word parts to define science words. For more goal wording, see the vocabulary goals page. Before the meeting, run your draft through the goal checker.

Frequently asked questions

What grade should root words be taught?

Common prefixes and suffixes usually start in grades 2 to 4. Latin roots often start in grade 4 or 5, and Greek parts follow in upper elementary and middle school. Students with IEPs may need the same sequence later, with more review.

What are the most useful roots to teach first?

Start with roots that appear in many common words and are easy to show, such as rupt (break), port (carry), struct (build), dict (say), spect (look) and tract (pull). Pick roots that show up in the student's current texts.

Do root words help with decoding too?

Yes. A student who recognizes parts can read a long word in chunks instead of letter by letter. That is one reason morphology instruction appears in guides for older struggling readers.

Use it in IEP Atlas

Sources

Providing Reading Interventions for Students in Grades 4–9, What Works Clearinghouse, Institute of Education Sciences
Improving Adolescent Literacy: Effective Classroom and Intervention Practices, What Works Clearinghouse, Institute of Education Sciences

Written and checked by the IEP Atlas editorial team under our editorial policy. This guide describes general practice and federal rules. It is not legal advice; your state may add requirements, and the IEP team makes the decisions for each student.