Back to all posts
Research · Nathan Patton

End-of-Year Report: Impact of Once on K Reading Growth 23-24 as Measured by aimswebPlus

A gap-closing impact study — kindergarten students using Once at an Ohio school grew faster than their national peers and the rest of the district on aimswebPlus.

There are many reasons to look forward to summer. One of my favorites is that we start to get fresh assessment data from our partners!

This report describes the gap-closing impact that Once had through a full-kindergarten implementation at a school in Ohio according to their aimswebPlus data for the 2023-2024 school year.

The sample size is small (44 students with BOY and EOY scores), but the percentile numbers tell a clear story: students who got Once grew at a rate that greatly exceeded their national peer group and the rest of the kindergarteners in their district as well!

Expect more reports soon about results from this past school year! We’re receiving data now from schools across the country using assessments from iReady to DIBELS.

Tags Research Report Kindergarten Ohio

More from Research

Research

Quasi-Experimental Study on Impact of Once on Kindergarten Reading Growth 24-25 as Measured by Fastbridge

The first ESSA Tier II quasi-experimental study on Once — LXD Research finds a 0.46 standard deviation effect (p<0.001) for kindergarten students who received 80+ Once tutoring sessions.

Matt PasternackRead
Research

2025-26 JHU–Once Randomized Controlled Trial Randomization Brief

Once is partnering with Johns Hopkins University on a multi-year randomized controlled trial to rigorously measure program impact on early-literacy outcomes.

Once TeamRead
Research

End-of-Year Report: Impact of Once on Kindergarten Reading Growth 24-25 as Measured by Fastbridge

An LXD Research study of 551 kindergarteners across 35 Southeast schools shows students who completed 80+ Once sessions were 7× more likely to reach low/no risk by spring.

Mindy HellbuschRead