Incidental teaching of language in the preschool.

Eleven preschoolers spent their free-play time in a day-care room.

Teachers waited for kids to start talking about toys.

When a child said something simple, the teacher asked for a little more.

They modeled a compound sentence like “I want the truck and the blocks.”

No drills. No table work. Just quick chats during play.

Every child began using full “and” sentences on their own.

First they said them to teachers.

Later they used the same sentences with friends.

The growth showed up in everyday play, not just in tests.

Zhou et al. (2018) later taught autistic elementary students to write sentences.

They used a clear step-by-step package instead of casual play.

Both studies got more sentences, showing the idea works for different ages and styles.

Rasing et al. (1992) and Crosbie (1993) used a drill-plus-praise plan with deaf children who had language delays.

Their kids also gained social words, proving brief adult coaching keeps working across groups.

Murdock et al. (1977) found that articulation only spread when kids practiced with two adults in two places.

Smith et al. (1975) did not set up extra rooms yet still saw peer-to-peer growth, hinting that rich play spaces may give enough varied practice on their own.

You can grow advanced language without stopping play.

Next time a child asks for something, stretch the sentence: “Cars and what else?”

Model the full form once, then hand over the toy.

In minutes you get natural practice, happy kids, and data to graph.