Wren’s logic model

A logic model is a map of how a program is meant to work: what goes in, what is done, what comes out, and what should change for children. The U.S. Department of Education asks for one from any program at the fourth evidence level under the Every Student Succeeds Act, “demonstrates a rationale,” together with an ongoing effort to study the program’s effects. This is Wren’s. Every link in it points to the research it rests on. None of that research tested Wren itself.

ESSA evidence level 4, “demonstrates a rationale.” This page is a research-informed plan plus a study in progress. It is not evidence that Wren works, and Wren claims no higher level.

Where this sits on the ESSA evidence levels

The Department’s regulations define the level this page is written to: “Demonstrates a rationale means that there is a key project component included in the project’s logic model that is supported by citations of high-quality research or evaluation findings that suggest that the project component is likely to significantly improve relevant outcomes.” They define the logic model itself as “a framework that identifies key project components of the proposed project (i.e., the active ‘ingredients’ that are hypothesized to be critical to achieving the relevant outcomes) and describes the theoretical and operational relationships among the key project components and relevant outcomes.”

The law adds a second part. As quoted in the Department’s 2023 guidance, an evidence-based activity at this level “(I) demonstrates a rationale based on high-quality research findings or positive evaluation that such activity, strategy, or intervention is likely to improve student outcomes or other relevant outcomes; and (II) includes ongoing efforts to examine the effects of such activity, strategy, or intervention.” The Department’s 2016 guidance (now archived) put it as a well-specified logic model informed by research, and “an effort to study the effects of the intervention, ideally producing promising evidence or higher, that will happen as part of the intervention or is underway elsewhere.”

The three higher levels need a study of the program itself: promising evidence (level 3) needs at least “a well-designed and well-implemented correlational study with statistical controls for selection bias” with a statistically significant positive effect; moderate evidence (level 2) needs an experimental or quasi-experimental study that meets What Works Clearinghouse standards, with at least 350 students from more than one site; strong evidence (level 1) needs an experimental study that meets those standards without reservations. No such study of Wren exists yet. The sections below give the logic model (the first part of level 4) and the study in progress (the second part).

Sources

  1. U.S. Department of Education. Education Department General Administrative Regulations, 34 CFR 77.1, Definitions that apply to all Department programs (eCFR, current as of October 2026).
  2. U.S. Department of Education (2023, September 28). Non-regulatory guidance: Using evidence to strengthen education investments (revised).
  3. U.S. Department of Education (2016, September 16; archived). Non-regulatory guidance: Using evidence to strengthen education investments.

The problem Wren addresses

The skills children bring to kindergarten matter: across six large long-term studies, the math, reading and attention skills children had when they started school were the strongest predictors of later achievement (Duncan and colleagues, 2007), and the National Early Literacy Panel found that letter knowledge, hearing the sounds in words and other skills measured before kindergarten predict later reading (2008). Wren’s premise is that families of 3-to-6-year-olds, including Arizona homeschool and ESA families, want a short daily practice of exactly those skills at home, in English or Spanish, inside pediatric screen-time guidance, with their child’s data kept private. The beta tests that premise as much as it tests the product.

Sources

  1. Duncan, G. J., Dowsett, C. J., Claessens, A., Magnuson, K., Huston, A. C., Klebanov, P., et al. (2007). School readiness and later achievement. Developmental Psychology, 43(6), 1428–1446.
  2. National Early Literacy Panel (2008). Developing early literacy: Report of the National Early Literacy Panel (summary). National Institute for Literacy.

Resources

What goes in

  • A curriculum of 225 skills in nine areas, each matched to the Arizona Early Learning Standards, the Head Start Early Learning Outcomes Framework, the Common Core, Arizona’s kindergarten standards and the CASEL framework (307 codes in all).
  • Pip: pre-recorded lines in English and Spanish, 36 activity types, 47 item generators and 12 read-along stories; nothing a child hears is generated on the fly.
  • The engine: a per-skill mastery estimate updated after every answer, mastery rules, a 2-, 7-, 21- and 60-day review ladder, and a planner that picks the next session.
  • Limits built in: 12-minute sessions (5 to 20), a daily cap (20 minutes to start, up to 30), quiet hours, a hard stop; no streaks, rewards for returning or notifications.
  • For the family: 225 off-screen missions, 67 coaching cards, a short read after every session, a readiness picture by area, and ESA records, in English and Spanish.
  • The family’s own tablet or phone (the app works offline), a parent nearby, and about 12 minutes a day.
  • Privacy by design: the child’s name, mood and voice stay on the device; the server holds a learner code, an age band, session and skill events, and the parent’s own answers.

Activities

The key components, each with its research below

  • Short daily sessions at a slow pace, ended by Wren.
  • Two placement sessions, then the next right step: 2 to 3 skills the child is ready for, weakest first.
  • Practice to a mastery criterion (4 of the last 5 right on the first try, on at least 2 days).
  • Spaced review of mastered skills at 2, 7, 21 and 60 days.
  • Hints after a first miss, a model answer after a second, never “wrong.”
  • Early reading and early math in every session, plus one rotating area.
  • Movement, breathing and self-control games in every session.
  • An off-screen mission after every session and three coaching cards a week for the parent.
  • English or Spanish, with eight universal-design options.

Outputs

What is done, counted

  • Sessions started and completed per child; days active; minutes with Pip.
  • Items answered per skill, with tries, hints and response times.
  • Skills reaching Practicing and Mastered; reviews passed and missed.
  • Off-screen missions marked “We did it”; coaching cards shown.
  • Session reads delivered to parents (rules-based or AI-drafted and reviewed), with the parent’s accuracy rating.
  • Daily one-tap check-ins, weekly surveys, reports and errors.

Short-term outcomes

Within weeks (measured in the beta)

  • Children use Wren most days and finish sessions at the stop.
  • Within Wren, skills move from Starting to Practicing to Mastered, and the readiness number rises from day 1 to day 28.
  • Parents do the off-screen mission on most evenings and say the session read matched what they saw.
  • Children in Spanish-language homes and children using the universal-design options make the same kinds of progress.
  • Caveat: these are measured by Wren’s own instrument, which practices the same items it measures, so they show use and progress inside Wren, not an effect of Wren.

Long-term outcomes

By kindergarten entry (not yet measured)

  • Children enter kindergarten with stronger letter knowledge, phonological awareness, counting and number knowledge, and self-regulation, as measured by an outside instrument that Wren did not build.
  • Wren’s readiness number tracks that outside measure closely enough to be useful to families.
  • Families keep a short daily learning routine after the beta.
  • The hoped-for impact beyond that, better reading and math achievement in the early grades, is the reason the research gives for starting early; Wren does not claim it.

The ongoing effort to study effects

Wren’s first study is the 25-family, 4-week Arizona beta. Its measures were written down before the first family starts, in the beta protocol (section 5), and every one is collected by learner code, never by name. The table lists the measures about use, learning and safety; the protocol also lists the commercial questions asked at the end.

AreaWhat is measuredFrom
UseSessions started and completed per child; days active; time of daysession records
Fit of the formatShare of sessions ending at the hard stop, by the child, by the parent or declined; median session lengthhow each session ended, duration
Learning signalItem accuracy by skill; hint rate; response time; change in the readiness number from day 1 to day 28skill events
ListeningShare of families with listening on; use of the tap fallback; parent-reported issuessession flag, weekly survey
Parent experienceDaily check-in results; weekly survey; how accurate the session read felt; how clear the readiness number wassurveys
Off-screen loopShare of evenings the off-screen activity was donethe daily check-in
SafetyDeclines, distress reports, content concerns, incidentsreports
ReliabilityError reports, failed loads, consent-flow drop-offlogs

A small beta without a comparison group can show whether children use Wren and make progress inside it. It cannot show that Wren caused that progress, and the readiness number cannot serve as an outcome measure of Wren’s effect, because an outcome measure must not be tailored to the program it measures (the What Works Clearinghouse calls this overalignment). The next steps are a correlational study with statistical controls (level 3) and then a quasi-experimental study with a matched comparison group (level 2), both with an outside kindergarten-entry measure as the outcome and both pre-registered. Until one is done, Wren reports use, engagement, parent follow-through and skill movement inside Wren, and nothing more.

Sources

  1. What Works Clearinghouse (2022). What Works Clearinghouse Procedures and Standards Handbook, Version 5.0 (WWC 2022008). U.S. Department of Education, Institute of Education Sciences.
  2. U.S. Department of Education (2023, September 28). Non-regulatory guidance: Using evidence to strengthen education investments (revised).

Assumptions

  • A parent or caregiver is nearby for the session and the off-screen mission on most days.
  • The family has a tablet or phone and home Wi-Fi for the first install; sessions then work offline.
  • Children ages 3 to 6 will answer a pre-recorded tutor; the beta measures how often they decline.
  • The standards matching is Wren’s own; no framework publisher has reviewed it.
  • The mastery estimate and the readiness number are Wren’s own instruments; neither has been checked against an outside measure yet.

What this page does not claim

  • No study has tested Wren. The studies cited tested the methods, mostly in classrooms and labs, and some with older children.
  • Wren has not been reviewed by the What Works Clearinghouse or by the U.S. Department of Education. The evidence levels are definitions a program is measured against, not a seal Wren holds.
  • No effect sizes, and no claim that Wren works, raises readiness or improves later achievement.
  • The readiness number is Wren’s own estimate, not a standardized test, and its agreement with outside measures is unknown until the validation study.
  • The beta’s results will be reported with the number of families, how many left, and no causal language.
  • Every standard code Wren addresses
  • How Wren teaches: the full method page

How this page was built: the Department’s definitions were taken from the regulation and the guidance documents linked above; the logic model follows the elements in the Institute of Education Sciences’ logic model toolkit (problem statement, resources, activities, outputs, short- and long-term outcomes, assumptions); the research sentences are the ones checked for the How Wren teaches page. We review this page when the research, the law or Wren changes.

Reviewed October 4, 2026. · Privacy notice · Back to the top