The Bank Problem
During a small-group vocabulary lesson, four fifth graders read a science article containing two sentences: “The river bank had eroded, and the current was too strong for the small boat.” Later: “The town bank funded the new bridge.” Marcus says both “bank” words mean the same thing “because they’re spelled the same.” Asked about “current,” he points to the sentence and says it means “happening now.” The group also meets “unpredictable” and “transportation.” Ms. Reyes has a dictionary, a thesaurus, and the article’s glossary on the table. The lesson objective is “Use context clues and reference materials to determine word meanings.” Marcus decodes accurately but rushes, and he treats the dictionary as a list of one right answer per word. Ms. Reyes has 20 minutes and wants students to leave with a procedure they can use without her.
1. What is Marcus’s underlying misconception, and what sequence of questions should Ms. Reyes ask to replace it with a procedure?
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Misconception. Marcus believes spelling determines meaning one-to-one. He is not guessing randomly; he is applying a rule that usually works in his reading and fails with multiple-meaning words.
Question sequence.
- “Read the sentence without the word - what is happening here?” (River, erosion, a boat.) This establishes the topic before the word pulls him toward money.
- “Which meaning fits what is happening?” (Land beside water.)
- “Now check the other sentence. Does that meaning still fit?” (No - a town bank funding a bridge is an institution.)
- “So what does the word have?” (More than one meaning; the sentence chooses.)
- “Where would you check, and how would you pick the entry?” (Dictionary or glossary; match the entry to the sentence’s topic.)
Generalization to write on the board. “Same spelling does not mean same meaning. Read the sentence first, then choose.”
Why ask rather than tell. Marcus needs the failed prediction to feel the rule break; being told creates a fact he may not apply next time.
2. Using “current,” show how Ms. Reyes should teach students to select among dictionary entries rather than grab the first one.
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Start with the sentence, not the dictionary. “The current was too strong for the small boat.” Ask what kind of thing can be “too strong” in a river and can affect a boat. Water in motion fits; “happening now” does not fit the grammar of “the current was too strong.”
Then open the dictionary. Show two entries: (1) a flow of water in a definite direction; (2) belonging to the present time. Read both aloud.
Apply a three-step test.
- Grammar: is the word used as a noun or an adjective? Here it is a noun, which eliminates the adjective sense.
- Topic: the paragraph is about a river and a boat, which points to entry 1.
- Substitution: read the sentence with each meaning. “The happening-now was too strong for the boat” fails; “the flow of water was too strong” works.
Why this matters for Marcus. He used a real meaning of “current” - just not this one. The lesson is that the dictionary offers options and the sentence chooses. Have him record the chosen entry number beside the sentence.
3. How should Ms. Reyes use morphology with “unpredictable” and “transportation” so that students can handle unfamiliar words later, rather than just these two?
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Build a word-sum routine. For “unpredictable”: un- (not) + predict (say in advance) + -able (can be). Put it together: “not able to be said in advance.” Ask students to test it against the article - if the river’s current is unpredictable, the boat cannot plan.
For “transportation.” trans- (across) + port (carry) + -ation (the act or process). “The act of carrying across.” Connect to “portable” and “transport,” which students may know, so the root becomes a tool, not a fact.
Make the procedure portable. Post three steps: split the word, name what each part means, and check the meaning against the sentence. If the sentence does not fit, the split is wrong - revise it.
Common trap to address. “Un-” does not always mean “not” (as in “uncle”), and “-ation” does not change the core meaning. Tell students to confirm with context before trusting the split.