Grade 3 Fall — Personal Narrative, Complex Sentences with Subordinate Clauses, and Morphology with Affixes and Roots
Lesson 19 50 min eng.g3.f.lesson_19.latin_roots_detective

Latin Roots — Act, Port, Struct, Ject, Form: Detective Routine

Skills targeted
Objectives
  • Students recognize 5 Latin roots and their meanings (act=do, port=carry, struct=build, ject=throw, form=shape).
  • Students apply the root-meaning DETECTIVE routine on 4 unfamiliar words.
Vocabulary
Latin rootact (do)port (carry)struct (build)ject (throw)form (shape)detective routine

Lesson plan

Warm-up

5 min

Root-meaning chorus: teacher calls a root; children chorus the meaning (act→do, port→carry, struct→build, ject→throw, form→shape). Reverse: teacher calls meaning; children call root.

Teacher moves
  • Mix order to build retrieval
  • Affirm; repeat the misses

Direct instruction

15 min

Big day. Today we meet our first FIVE Latin roots — the little Latin pieces that show up in HUNDREDS of English words. Once you know them, you can predict the meaning of words you've never seen before. ACT means DO. Action = the act of doing. React = do back. Actor = one who does. PORT means CARRY. Import = carry IN. Export = carry OUT. Portable = able to carry. Transport = carry across. STRUCT means BUILD. Structure = a thing built. Construct = build TOGETHER (con- + struct). Instruct = build INTO (someone's mind). Destruct = build apart (de- + struct = take down). JECT means THROW. Inject = throw INTO. Eject = throw OUT. Project = throw FORWARD (a plan thrown forward). Reject = throw BACK. FORM means SHAPE. Form = the shape. Inform = put into shape (the mind). Transform = shape across (change). Uniform = one shape. Look at MG-9 root section. Today's DETECTIVE: find the root, recall the meaning, predict the whole word, check.

Key examples
  • Predict + check. The routine works.
    model Prefix: TRANS (across). Root: PORT (carry). Predicted: carry across. Real: move from one place to another. ✓
    prompt Detective: TRANSPORT.
  • Project literally means a thing thrown forward — a forward plan.
    model Prefix: PRO (forward). Root: JECT (throw). Predicted: thrown forward. Real: a plan thrown into the future — a thing you plan to do. ✓
    prompt Detective: PROJECT (as a noun).
  • Even the most familiar words have root logic.
    model Prefix: IN (into). Root: FORM (shape). Predicted: shape into. Real: tell someone — put the info into the shape of their mind. ✓
    prompt Detective: INFORM.
Checks for understanding
  • What does PORT mean?
  • Predict the meaning of CONSTRUCT (build + TOGETHER).
Media
M-3-F-VOC-19-A Chart
Reproduction of MG-9 bottom section at 11x17: 5 root cards in a horizontal strip, each color-coded. ACT (purple, 'do') w

Reproduction of MG-9 bottom section at 11x17: 5 root cards in a horizontal strip, each color-coded. ACT (purple, 'do') with family branch diagram: act → action, react, actor, active. PORT (teal, 'carry') with: import, export, portable, transport. STRUCT (orange, 'build') with: structure, construct, instruct, destruct. JECT (red, 'throw') with: inject, eject, project, reject. FORM (green, 'shape') with: form, inform, transform, uniform. Each root family in a four-leaf or five-branch diagram. Print-ready, dyslexic-friendly font.

MG-9 Chart Physical / non-image

Affix and Latin root anchor poster: top section PREFIXES — COM-/CON- (means 'together / with') with examples combine, connect, compare, conduct; SUB- (means 'under / below') with examples submarine, subway, subtract, subzero. Middle section SUFFIXES — -TION (means 'act, state, or result of') with examples action, motion, attention, direction; -MENT (means 'act, state, or result of') with examples movement, payment, agreement, government. Bottom section ROOTS — ACT (do): action, react, actor. PORT (carry): import, export, portable. STRUCT (build): structure, construct, instruct. JECT (throw): inject, eject, project. FORM (shape): form, inform, transform. Each row color-coded; root family branches diagrammed. Print-ready 11x17.

Guided practice

15 min
Tasks
  • Detective on 5 new words (transport, project, structure, react, transform). Strip prefix and suffix; predict; check.
    scaffold Detective bookmark + MG-9 + dictionary
  • Build a four-leaf word-family map for one root (act OR port). Center: root. Four branches: 4 family members.
    scaffold Four-leaf template + root card
Media
M-3-F-VOC-19-B Chart
11x17 split anchor. Top half: detective bookmark with 4 steps (1. FIND THE ROOT. 2. RECALL THE ROOT MEANING. 3. PREDICT

11x17 split anchor. Top half: detective bookmark with 4 steps (1. FIND THE ROOT. 2. RECALL THE ROOT MEANING. 3. PREDICT THE WHOLE-WORD MEANING. 4. CHECK THE DICTIONARY) plus a worked example for TRANSPORT. Bottom half: sample completed four-leaf word-family map for the root PORT — center 'PORT (carry)' surrounded by four leaves: IMPORT (carry in), EXPORT (carry out), PORTABLE (able to carry), TRANSPORT (carry across). Each leaf with a tiny illustration. Print-ready, dyslexic-friendly font.

Formative assessment

3 min
Exit ticket
  • Match: act / port / struct / ject / form to: build / throw / shape / do / carry.
  • Predict the meaning of EJECT.
scoring All 5 matched + prediction correct = mastery; 1 mismatch = practicing; 2+ mismatches = reteach with cards.

Closure

2 min
Moves
  • Hold up your word-family map.
  • Predict: tomorrow we begin the second narrative — turning-point moment.

Homework

10 min
Tasks
  • Find one word in a book at home that contains one of the 5 Latin roots. Strip and predict the meaning.

Exercises in this lesson

eng.g3.f.ex_37
Match each Latin root to its meaning: ACT / PORT / STRUCT / JECT / FORM. Meanings: build / throw / shape / do / carry.
 match root to meaning · diff 2
eng.g3.f.ex_38
Apply the detective routine on 4 words. For each: (a) name the root; (b) name the root meaning; (c) predict the whole-word meaning; (d)...
 detective routine unfamiliar word · diff 4

Differentiation

Scaffolds
  • Root-meaning card at every desk (5 cards)
  • Detective bookmark with each step listed
  • Reduced detective set (3 words)
Extensions
  • Detective on 3 STRETCH words: subterranean, projectile, infrastructure.
  • Build a six-branch word family for FORM (form, inform, transform, formal, formation, uniform).
English Learners
  • Bilingual root cards (Spanish: portar = to carry, formar = to shape — perfect cognates)
  • Slow oral detective demo
Ieps 504s
  • Pre-stripped words
  • Reduced target: 2 detective words
  • Adult mediator on detective routine

Teacher notes

Latin roots are the keystone of Grade-3 morphology. The five chosen (act, port, struct, ject, form) cover hundreds of mid-frequency English academic words. The detective routine is the long-haul strategy — it will be used in every subsequent grade. Watch for two issues: (1) treating the root as enough alone (root + prefix + suffix combine; the prediction must use all three); (2) trusting predictions that turn out to be off — explicitly model that predictions are guesses to CHECK, not facts. The dictionary check is a non-negotiable step of the routine. Plan to add 5 more Latin roots in Grade 3 Spring (spec, dict, scrib, vid, mit).