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.
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.
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.
End-of-Year Report: Impact of Once on Kindergarten Reading Growth 24-25 as Measured by i-Ready
A new LXD Research study of 822 kindergarten students found those receiving 20+ hours of 1:1 Once tutoring grew over 20 percentile points on i-Ready.
Customer Training — Wentzville
Wentzville School District is officially trained and ready to launch — becoming the third district to join our partnership with Johns Hopkins University in a groundbreaking RCT.
Customer Training — MSD of Lawrence Township
Once instructors across 2 schools in MSD Lawrence Township stepped up on day 1 to learn how to serve Kindergarten students — fueling growth and groundbreaking research.
Customer Training — MSD Wayne
Once instructors at MSD Wayne Township in Indiana are officially trained — bringing daily 1:1 reading tutoring to kindergarteners as part of the Johns Hopkins RCT.
Reflections on the 2025 National Student Support Accelerator Annual Research Conference
Our second year at the NSSA Annual Research Conference — a serious group sharing serious ideas on effective high-impact tutoring, with broader district and state representation.
New National Student Support Accelerator Report Studies Employing Paraprofessionals as High-Impact Tutors
Once is featured in an NSSA report studying the potential benefits of paraprofessionals as tutors in early elementary classrooms.
End-of-Year Report: Impact of Once on K Reading Growth 23-24 as Measured by i-Ready
LXD Research's 2023-24 end-of-year analysis across three schools showed kindergarten students on Once grew from the 38th to the 67th percentile nationally on i-Ready.
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.
Effects of High-Impact Tutoring on Early Literacy Outcomes: A Pilot Study of a 1:1 Program With Existing Staff
A 2022-23 Stanford NSSA pilot study of Once tutoring in a large urban district — students receiving Once scored two points higher on end-of-year DIBELS than peers.
New Report Shares Promising Practices for Implementing High-Dosage Tutoring in American Schools
Accelerate and Mathematica release a new report summarizing best practices and lessons learned from their first cohort of Call to Effective Action grantees, including Once.
International Dyslexia Association DyslexiaCon23
LXD Research's Dr. Rachel Schechter attended the IDA 2023 Annual Reading, Literacy & Learning Conference to share her work studying Once's impact on kindergarten reading growth.
End-of-Year Report: Impact of Once on K Reading Growth 22-23
Once Research Report for Kindergarten 22-23 from LXD Research, measuring Once's impact on kindergarten reading achievement during the 2022-23 school year.
We've Been Awarded a Call to Effective Action Grant from Accelerate
Once is a second-time grantee for Accelerate's Call to Effective Action, enabling us to conduct research trials demonstrating efficacy before scaling our impact.
Mid-Year Report: Impact of Once on K Reading Growth 22-23
Preliminary Research Report for Once Kindergarten Tutoring Fall 2022 from LXD Research, showing impact on kindergarten reading achievement in the first half of the school year.
National non-profit Accelerate selects Once to explore sustainable models for high-impact tutoring
Once is honored to be selected as a grantee for Accelerate's Call to Effective Action — a national effort to develop and scale sustainable, cost-effective high-impact tutoring.