Cross-age tutoring: fifth graders as arithmetic tutors for kindergarten children.

The team paired 10 fifth graders with 10 kindergarteners who needed help with numbers. Each fifth grader got a 20-minute training on how to praise right answers and gently correct mistakes. Then the pairs met for 15 minutes a day, four days a week, for six weeks.

The kindergarteners had to count objects and match them to written numbers. Tutors gave a sticker for every correct set. A no-treatment class next door kept doing regular math lessons so the researchers could compare gains.

The tutored kindergarteners jumped from 30 % correct to 85 % correct on the counting test. The control class only moved from 28 % to 40 %. The gap was large enough that no statistics were needed to see it.

The fifth-grade tutors also gained: their own arithmetic fluency scores went up 12 %, and teachers noted they talked less during lessons.

Gladstone et al. (1975) later showed the idea can go further. They trained high-school students with a short BST package—video model, practice, feedback—and the teens then taught new skills to children with intellectual disabilities without extra help. Thompson et al. (1974) proved younger tutors can work; Gladstone et al. (1975) showed the same model can create generalized teaching skills.

Schmidt et al. (1969) used teacher praise to cut disruption in a high-school class. M et al. shifted the agent from teacher to peer but kept the same simple praise-plus-correction formula. The 1974 study extends the 1969 finding by showing peers can deliver the contingency and still get big gains.

Stocker et al. (2021) boosted 6th-grade math with self-managed sprints. Both papers raise math scores, but one used peer tutors and the other used self-timing. The tools differ; the outcome is the same—students doing more correct digits per minute.

You can build a tutoring army in any elementary school. Train older students once, give them stickers and a script, and let them run daily 15-minute sessions. You gain small-group instruction without hiring extra staff, and both tutors and tutees walk away better at math. Try it on Monday: pick a reliable fifth-grade class, teach them to praise right answers, and start with counting objects 1–10.