Research Guidance

High-dosage tutoring, sometimes called “high-impact” or “high-intensity” tutoring, is one of the few school-based interventions with demonstrated significant positive effects on math and reading achievement. Yet high-dosage tutoring is a very specific form of tutoring that must meet specific criteria:

• One-on-one or small-group sessions with no more than four students per tutor
• Use of high-quality materials that align with classroom content
• Three tutoring sessions per week—at minimum—each lasting at least 30 minutes
• Sessions held during school hours
• Students meeting with the same tutor each session
• Professionally trained tutors who receive ongoing support and coaching

The first randomized controlled trial of a virtual tutoring program for reading was conducted during the 2022-23 school year at a large charter school network in Texas. Kindergarten, first and second graders received 20 minutes of video tutoring four times a week, from September through May, with an early reading tutoring organization called OnYourMark. Despite the logistical challenges of setting up little children on computers with headphones, the tutored children ended the year with higher DIBELS scores, a measure of reading proficiency for young children, than students who didn’t receive the tutoring. One-to-one video tutoring sometimes produced double the reading gains as video tutoring in pairs, demonstrating a difference between online and in-person tutoring, where larger groups of two and three students can be very effective too. That study was published in October 2023. 

Thankfully, states and districts aren’t sitting on their hands in the face of learning loss. Supported by billions of dollars of federal funds, many have invested heavily in tutoring programs that promise to help struggling children overcome the challenges imposed by past school closures and virtual instruction. The question is whether those efforts work for enough students to justify their cost — and according to data generated by the National Student Support Accelerator, a Stanford initiative devoted to studying the effects of tutoring, there is reason for hope.

What makes tutoring high-impact? According to the National Student Support Accelerator, it involves substantial time each week, sustained and strong relationships between students and tutors, close monitoring of student knowledge and skills alignment to school curriculum, and oversight to ensure quality interactions. 

“So, high impact tutoring is tutoring that happens with a qualified tutor and that means someone who is trained and is receiving coaching. It also happens frequently. So at least three to 5 times a week, in a small group or one-on-one. It is very personalized,” says Director of Partnerships and Policy for the National Student Support Accelerator Nancy Waymack.