Tangipahoa Kindergarten DIBELS Results: 24% to 68% at Benchmark
A district-wide LXD Research study of 1,263 Tangipahoa kindergartners found DIBELS benchmark attainment rose from 24% to 68%. The results are correlational.
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.
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.
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.
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.