A kindergarten program with play and self-regulation: 33% read at a first-grade level, versus 10%

With schools randomly assigned, the program also combined reading and writing: 30% wrote an original sentence, versus 10% in the other group.

How we make these readings

The key idea

By the end of kindergarten, more children in classes using this program read at a first-grade level and wrote original sentences.

The study, in plain language

In these classrooms, reading and writing took place alongside guided play and partner activities. The program, called Tools of the Mind, was tested during the kindergarten year in 18 public schools in British Columbia: schools were randomly assigned to use it or continue usual instruction.

By the end of the year, a larger share of the program group reached a first-grade reading level and wrote an original sentence. The program organized several everyday classroom activities rather than adding one isolated lesson, so it is not clear which parts mattered most. The children were not measured again after kindergarten.

What they found

  • The trial compared Tools of the Mind, a comprehensive kindergarten program, with usual instruction.
  • At the end, a larger share of the program group read at a first-grade level.
  • Children who took part in the program were also more likely to write an original sentence.

Something to think about

How much of what children learn happens through playing by rules with a partner while reading and writing? This result comes from a full program; it does not show which part helped most.

How they studied it

A trial in 18 public schools in British Columbia randomly assigned schools to the program or usual instruction for one kindergarten year. About 350 children took part; their reading level and writing were measured at the end of the year.

What the study cannot show

  • An intervention lasting one school year in 18 schools in one province; comparison with a wait-list group; some measures were reported by teachers; assessment did not establish long-term persistence.
  • The study does not show that every guided-play program improves literacy, that the effect will hold in other countries or age groups, or that a digital tool can reproduce the curriculum.

The original study

Randomized control trial of Tools of the Mind: Marked benefits to kindergarten children and their teachers

PLOS ONE, 14(9), e0222447 · DOI 10.1371/journal.pone.0222447. Published .

Study authors (1)

Adele Diamond, Chris Lee, Peter Senften, Andrea Lam, David Abbott

DOI: 10.1371/journal.pone.0222447

Source under CC BY 4.0. English adaptation and explanation by PaperFlow, with AI assistance. The text has been reorganized for a general audience; it is not the complete paper and does not imply endorsement by its authors.

One study alone does not represent a field's consensus. Educational content does not replace professional advice. Report a possible error.