A 2019 Ohio State University study estimated that children who are read one book a day hear about 290,000 more words by age five than children who are not regularly read to. At five books a day, the difference approaches 1.4 million words.
The words children hear in their earliest years help form the foundation for learning, thinking and thriving. Yet this exposure is inconsistent for many children. The “million-word gap” describes the vast difference in words heard by children who are regularly read to and those who are not.
Equipping babies with an invisible toolbox
Children learn new words at school, but the vocabulary they already possess influences how much instruction they understand. As reading begins, a child’s vocabulary can strengthen—or impede—comprehension.
Kim J. Dickson’s The Invisible Toolbox uses a powerful metaphor: a child enters kindergarten carrying unseen resources that affect success for years to come. Shared reading from birth helps fill that toolbox with vocabulary, background knowledge, listening skills and confidence.
“Read-alouds are one of the most powerful tools we have. They build vocabulary, spark imagination, and develop listening and comprehension skills in young children.” — Dr. Rachel Edoho-Eket
Preparing children for lifelong learning
Teachers work throughout the school year to develop emerging readers. Summer, however, can become a period of regression unless families continue literacy activities at home.
To help bridge that gap, the J.C. Tamno Books Foundation launched Community Read Aloud Sessions for families in the Washington, D.C., and Philadelphia areas. The inaugural session in Gaithersburg, Maryland, featured Dr. Rachel Edoho-Eket reading The Principal Pals: Bright Minds, Big Dreams! and sharing practical literacy strategies with families.
What the study estimated
Researchers analyzed frequently circulated board books and picture books, counted their average words and estimated the number of words a child might hear from birth through age five:
- Never read to: approximately 4,662 words
- One to two reading sessions per week: approximately 63,570 words
- Three to five sessions per week: approximately 169,520 words
- Daily reading: approximately 296,660 words
- Five books a day: approximately 1,483,300 words
These estimates illustrate why frequent reading matters. Families do not need elaborate tools: talking, reading, singing and telling stories every day can create meaningful language exposure.
A call to action
Fostering a love of reading helps children enter kindergarten ready to learn. When families, caregivers and early educators make shared reading a regular part of life, they equip children with tools for vocabulary, imagination, listening, comprehension and connection—before the first day of school.
