Altering student responses through changes in teacher verbal behavior.

The team worked with a middle-school classroom.

They watched how often kids answered in full sentences.

Baseline was under five percent.

Then teachers changed two things.

They asked "what" and "how" questions instead of yes-no.

They also told the class, "Answer in a complete sentence."

If a kid forgot, the teacher pointed to a peer who modeled the form.

The researchers flipped this plan on and off four times to be sure it worked.

Complete-sentence replies shot up to about ninety percent.

When the teachers stopped the plan, the rate crashed back to near zero.

Each time they brought it back, the jump returned.

The reversal proved the teacher moves caused the change, not luck.

Rapport et al. (1982) extends these results.

They paid teens tokens for praising their tutees.

Both tutors and tutees then used longer, richer language.

It shows students, not just teachers, can deliver the verbal boost.

McKearney (1976) used the same ABAB design but changed teacher speed, not question type.

Fast pacing cut off-task behavior, while M et al. shows wording grows language form.

The two studies sit side-by-side: one targets time, the other targets structure.

Clark et al. (1973) is a conceptual cousin.

They gave tokens for varied adjectives and verbs in stories.

Both papers shape language parts; tokens worked for creative variety, simple prompts worked for sentence completeness.

You can lift language quality tomorrow without tokens or extra prep.

Ask open questions and add one clear rule: "Full sentences, please."

Point to a peer model when a kid slips.

The reversal design shows the move is powerful and reversible, so you can adjust on the fly.

Try it during morning meeting or reading group and watch the clock—ninety percent full-sentence answers in minutes.