# Focused Learning Time Source Ledger

Report: [Focused Learning Time in Homeschooling: A Global Evidence Review](../../../src/content/blog/focused-learning-time-homeschool.md)

Edition: 2026

Checked: 2026-08-12

Purpose: This ledger maps the report's material claims to the sources used to support them. It records the design and population where the source makes them available, why the source is relevant, and the limitation that governs how the report may use it. It is an editorial audit trail, not a claim that every source is equally strong or directly about homeschooling.

## Evidence policy

The report uses four evidence tiers:

- **Tier 1: primary research.** Original observations, experiments, intervention studies, or official legal text.
- **Tier 2: synthesis research.** Systematic reviews, meta-analyses, umbrella reviews, and established conceptual syntheses.
- **Tier 3: professional or official guidance.** Government, clinical, or professional-body guidance. These sources describe policy or practice, not necessarily causal educational effects.
- **Tier 4: pro-homeschool synthesis.** Homeschool research or advocacy sources that are relevant to a family-facing conclusion but must be labeled for sponsorship, design, sample, or generalizability limits.

The most important guardrail is category separation. Research about schools, tutoring, cognitive psychology, health, or legal rules can inform a homeschool planning framework, but it does not automatically become direct evidence about homeschool outcomes.

## Claim ledger

| Claim ID | Report claim | Source | Design and population | Relevance | Limitation and permitted use | Checked |
| --- | --- | --- | --- | --- | --- |
| F01 | Time in school, instructional time, and academic learning time are different constructs. | [S01](https://pmc.ncbi.nlm.nih.gov/articles/PMC7359915/), [S04](https://www.oecd.org/content/dam/oecd/en/publications/reports/2016/02/student-learning-time_g17a275c/5jm409kqqkjh-en.pdf) | Systematic review and OECD research synthesis covering school-time interventions and prior meta-analytic work. | Establishes the five-clock vocabulary and warns against using broad allocated time as a learning proxy. | Definitions vary across studies and periods. Use for conceptual distinctions, not a universal conversion formula. | 2026-08-12 |
| F02 | The two-hour homeschool claim is not a universal research finding. | [S02](https://hslda.org/post/homeschoolers-may-need-less-instructional-time-than-traditional-school-students), [S05](https://doi.org/10.1177/001440298304900414), [S06](http://www.jstor.org/stable/42899486), [S07](https://eric.ed.gov/?id=EJ683444) | Secondary pro-homeschool synthesis plus one classroom observation and two specialized homeschool studies. | Supports a qualified explanation for how the claim arose and why individual attention may matter. | None tested a universal two-hour target. S02 is advocacy synthesis. S06 and S07 are small or specialized and nonrandom. | 2026-08-12 |
| F03 | Greenwood and Stanley observed 100 randomly selected fourth-grade students in four Kansas City schools. | [S05](https://doi.org/10.1177/001440298304900414) | Direct classroom observation study of fourth-grade students in four schools. | Provides the population and setting for the opportunity-to-respond discussion. | The study is geographically, historically, and demographically bounded. The page abstract does not support global or homeschool generalization. | 2026-08-12 |
| F04 | The commonly repeated 400-minute, 250-minute, and 67.5-minute figures are secondary-summary figures tied to a specific observation context. | [S02](https://hslda.org/post/homeschoolers-may-need-less-instructional-time-than-traditional-school-students), [S05](https://doi.org/10.1177/001440298304900414) | HSLDA summary interpreted alongside the original observation citation. | Allows transparent quotation without presenting the numbers as a national average. | The exact figures should be attributed to the summary and paired with the original study. Do not call them universal averages. | 2026-08-12 |
| F05 | Opportunity to respond makes an invisible instructional process measurable. | [S05](https://doi.org/10.1177/001440298304900414) | Direct observation using classroom coding procedures. | Supports the report's emphasis on learner responses, practice, and feedback. | Opportunity to respond is a process measure, not the same as durable mastery or whole-child learning. | 2026-08-12 |
| F06 | Duvall's ADHD comparison involved two male and two female elementary students observed in homeschool and public-school settings. | [S07](https://eric.ed.gov/?id=EJ683444) | Exploratory comparison of four elementary students with ADHD using MS-CISSAR observation, pre/post standardized achievement, and rate-based measures. | Directly supports the careful discussion of student-to-adult ratio and engagement. | Four participants, nonrandom setting selection, specialized population, and observational design prohibit broad causal claims. | 2026-08-12 |
| F07 | Duvall's ADHD study reported about twice the academic engagement for homeschool students and more reading and math gains. | [S07](https://eric.ed.gov/?id=EJ683444) | Same four-child exploratory study. | Supports a qualified pro-homeschool process finding. | The result is reported in the ERIC abstract and must remain qualified as a small comparison. It is not a population estimate or causal homeschool effect. | 2026-08-12 |
| F08 | The learning-time model depends on more than elapsed time. | [S08](https://doi.org/10.1177/016146816306400801), [S09](https://archive.org/details/humancharacteris00bloo) | Foundational conceptual models of school learning and mastery learning. | Supports the report's planning emphasis on opportunity, perseverance, quality, and learner differences. | These are conceptual frameworks and older syntheses, not modern homeschool trials. | 2026-08-12 |
| F09 | Tutoring and individualized attention have positive average evidence in PreK-12 research. | [S12](https://doi.org/10.3386/w27476) | Systematic review and meta-analysis of 96 experimental tutoring studies; one-to-one and small-group programs delivered by teachers, paraprofessionals, volunteers, or parents. | Supports the claim that individualized delivery can be valuable. | The settings, curricula, dosage, tutors, and outcomes vary. The pooled effect is not a homeschool estimate or a daily time recommendation. | 2026-08-12 |
| F10 | Targeted small-group reading interventions show varied effects by age and context. | [S14](https://pubmed.ncbi.nlm.nih.gov/29429496/) | Meta-analysis of 26 studies and 27 effect sizes, including elementary, middle, and high school populations. | Supports matching group size and instructional intensity to learner and task. | The interventions are school-based or intervention-program research and cannot be transplanted directly into family schedules. | 2026-08-12 |
| F11 | Direct Instruction has a substantial research literature with favorable academic findings, but this is not a time study. | [S13](https://doi.org/10.3102/0034654317751919) | Half-century meta-analysis of Direct Instruction curriculum research from 1966-2016. | Supports explicit modeling, guided practice, feedback, and structured release as evidence-informed options. | Program-level outcome research does not establish that any amount of direct instruction is optimal or that every child needs the same approach. | 2026-08-12 |
| F12 | Engaged time and time on task can be more closely related to outcomes than broad instructional time measures. | [S04](https://www.oecd.org/content/dam/oecd/en/publications/reports/2016/02/student-learning-time_g17a275c/5jm409kqqkjh-en.pdf), [S15](https://doi.org/10.1080/0013191900420102) | Research synthesis and review of curriculum-time management. | Supports the distinction between allocated time and active engagement. | Time-on-task is not equivalent to understanding or transfer and can be measured inconsistently. | 2026-08-12 |
| F13 | Time added to school schedules does not automatically produce the same learning gain as high-quality engaged time. | [S01](https://pmc.ncbi.nlm.nih.gov/articles/PMC7359915/), [S04](https://www.oecd.org/content/dam/oecd/en/publications/reports/2016/02/student-learning-time_g17a275c/5jm409kqqkjh-en.pdf) | Systematic review and synthesis of expanded school-time studies. | Supports caution about using clock time as the outcome. | Added-time interventions bundle different reforms and often report allocated rather than engaged time. | 2026-08-12 |
| F14 | Distributed practice supports later retention, with optimal spacing depending on retention interval. | [S16](https://doi.org/10.1037/0033-2909.132.3.354) | Quantitative synthesis of 839 assessments from 317 experiments in 184 articles on verbal recall. | Directly supports spaced homeschool review and revisiting concepts over days or weeks. | Much of the source base uses verbal recall tasks and laboratory or controlled designs. Do not infer a universal spacing schedule for every subject. | 2026-08-12 |
| F15 | Retrieval can improve delayed retention more than repeated study in some conditions. | [S17](https://doi.org/10.1111/j.1467-9280.2006.01693.x) | Two experiments using educationally relevant prose passages, comparing testing and restudy with delayed retention tests. | Supports low-stakes recall, explanation, and application as learning activities. | The experiments do not cover all ages, subjects, or homeschool contexts. Retrieval should include feedback and appropriate difficulty. | 2026-08-12 |
| F16 | Learning techniques vary in utility and conditions. | [S18](https://doi.org/10.1177/1529100612453266) | Evidence review of ten learning techniques by cognitive and educational psychologists. | Supports the report's rejection of universal study advice and its emphasis on matching method to task. | It is a synthesis, not a homeschool intervention and not a prescription for children of all ages. | 2026-08-12 |
| F17 | Brief rare breaks can protect vigilance in a sustained-attention task. | [S19](https://doi.org/10.1016/j.cognition.2010.12.007) | Experimental adult study of sustained attention and brief mental breaks. | Supports breaks as a reasonable attention-management experiment. | Adult laboratory task, not a child development study or a fixed work-rest rule. | 2026-08-12 |
| F18 | Guided play has evidence for selected learning and developmental outcomes while preserving child choice. | [S20](https://doi.org/10.1111/cdev.13730) | Systematic review of 39 studies; meta-analysis of 17 studies and 3,893 children, mean ages 1-8 across included studies. | Supports protecting guided play as a learning context without claiming all play is academic. | Studies vary in guidance, choice, outcomes, and quality. The review calls for further research. | 2026-08-12 |
| F19 | Unassisted discovery is not automatically superior to explicit teaching; guided or enhanced discovery can differ. | [S21](https://doi.org/10.1037/a0021017) | Two meta-analyses based on 164 studies comparing unassisted discovery with explicit instruction and enhanced discovery with other approaches. | Supports combining direct teaching with guided exploration. | Discovery categories and comparison conditions vary. This is not a homeschooling-specific result. | 2026-08-12 |
| F20 | Print exposure is associated with reading comprehension, technical reading, and spelling across development. | [S22](https://doi.org/10.1037/a0021890) | Meta-analysis of 99 studies and 7,669 participants from preschool through university. | Supports making reading a regular part of home learning and recording real reading evidence. | Much of the result is associational and may involve reciprocal causality. It does not prove a fixed number of reading minutes. | 2026-08-12 |
| F21 | Shared book reading interventions have positive but varied language effects. | [S23](https://doi.org/10.1111/cdev.13225), [S24](https://doi.org/10.1016/j.edurev.2019.100290) | Systematic review and meta-analysis of shared picture-book interventions; separate meta-analysis of shared book reading language outcomes. | Supports shared reading and adult-child discussion as useful activities. | Effects are smaller against active controls and vary with adult mediation, language, outcome, and age. | 2026-08-12 |
| F22 | Project-based learning has promising average effects but important moderators. | [S25](https://doi.org/10.1016/j.edurev.2018.11.001) | Meta-analysis of 46 effect sizes from 30 articles, 12,585 students in 189 schools across nine countries. | Supports projects as a purposeful application format. | School studies, heterogeneous designs, and moderators mean projects should not replace foundational instruction by default. | 2026-08-12 |
| F23 | Physical activity is not shown to be detrimental to academic achievement. | [S26](https://doi.org/10.1249/MSS.0000000000000901), [S28](https://pubmed.ncbi.nlm.nih.gov/32824593/) | Systematic review and umbrella review of school-age physical activity and academic evidence. | Supports including movement in a homeschool rhythm without treating it as lost academic time. | Effects are mixed or small, interventions differ, and the evidence is mostly school-based. | 2026-08-12 |
| F24 | Acute physical activity findings vary by outcome, age, and intervention. | [S27](https://doi.org/10.1111/sms.14479) | Systematic review and multivariate meta-analysis of acute physical activity studies in school-aged youth, searched through January 2023. | Supports a cautious claim about movement and attention or academic outcomes. | Acute effects do not establish long-term learning or a universal activity dose. | 2026-08-12 |
| F25 | Sleep quality, duration, and sleepiness relate to school performance. | [S29](https://doi.org/10.1016/j.smrv.2009.10.004), [S30](https://doi.org/10.1016/j.sleh.2018.02.004) | Meta-analysis of children and adolescents; separate systematic review of objectively measured sleep duration and cognition in children ages 5-13. | Supports treating rest and sleep as conditions for learning. | Mostly observational evidence, possible confounding, varied sleep measures, and no homeschool schedule implication. | 2026-08-12 |
| F26 | Pediatric sleep recommendations are health guidance, not educational-hour rules. | [S31](https://doi.org/10.5664/jcsm.5866) | Modified RAND consensus by 13 sleep experts informed by review of 864 studies; endorsed by the AAP in 2016. | Supports the report's distinction between health needs and school-time requirements. | Consensus recommendations are not causal homeschool evidence and should be interpreted within clinical guidance. | 2026-08-12 |
| F27 | ADHD guidance supports structure, environmental modifications, positive feedback, movement breaks, and tailored instruction. | [S32](https://www.nice.org.uk/guidance/ng87/chapter/recommendations), [S33](https://www.cdc.gov/adhd/treatment/classroom.html) | NICE clinical guideline and CDC professional/public health guidance. | Supports individualized learning conditions and flexible time. | Guidance is not proof that home education improves ADHD outcomes and notes limits in accommodation evidence. | 2026-08-12 |
| F28 | Classroom interventions can reduce off-task and disruptive behavior for children with ADHD symptoms. | [S34](https://doi.org/10.1371/journal.pone.0148841) | Meta-analytic review of antecedent, consequence, self-regulation, and combined classroom interventions. | Supports making environmental changes and monitoring learner response. | Interventions, outcomes, and symptoms vary; classroom findings do not establish a home intervention effect. | 2026-08-12 |
| F29 | England requires full-time suitable education but does not require the national curriculum for home education. | [S35](https://www.gov.uk/home-education) | Current official UK government guidance. | Provides a concrete legal example of full-time language with curriculum flexibility. | England is one jurisdiction. The page and linked guidance can change. | 2026-08-12 |
| F30 | England does not define full-time home education as a universal number of hours. | [S35](https://www.gov.uk/home-education) | Official government page and linked elective home education guidance. | Supports the global legal-time caveat. | Legal interpretation is jurisdiction-specific and must not be generalized to the UK or world. | 2026-08-12 |
| F31 | NSW registration relates to the educational program and records of implementation. | [S36](https://www.nsw.gov.au/education-and-training/home-schooling/registration-guidelines/registration-at-a-glance) | Current NSW Department of Education guidance. | Supports record-keeping and program-planning discussion. | NSW requirements are subnational and current policy can change. | 2026-08-12 |
| F32 | Ontario uses a policy framework for inquiries into whether satisfactory instruction is being provided at home. | [S37](https://www.ontario.ca/document/education-ontario-policy-and-program-direction/policyprogram-memorandum-131) | Ontario Ministry of Education Policy/Program Memorandum 131. | Shows a legal model centered on satisfactory instruction rather than a universal public number. | It is not a full summary of Ontario law and not a global rule. | 2026-08-12 |
| F33 | New Zealand requires an exemption for children educated at home instead of school and describes regularity and parental responsibility. | [S38](https://www.education.govt.nz/parents-and-caregiversprimary-school/schooling-in-nz/home-education) | Current New Zealand Ministry of Education guidance. | Shows another model using exemption and regularity language. | The phrase "as regularly as" is not converted into an hour count in the report. | 2026-08-12 |
| F34 | Pro-homeschool academic-outcome research exists but is uneven and should be qualified. | [S39](https://doi.org/10.1080/15582159.2017.1395638), [S40](https://doi.org/10.1111/cdep.12441) | Peer-reviewed homeschool research review and a broader developmental-perspectives review. | Supports an explicitly pro-homeschool but evidence-conscious editorial stance. | Research is limited, selection-prone, nonrandom, and uneven across countries and outcomes. It cannot prove that homeschooling generally causes better outcomes. | 2026-08-12 |
| F35 | Homeschooling can be discussed as a legitimate setting for individualized rhythm without claiming universal superiority. | [S39](https://doi.org/10.1080/15582159.2017.1395638), [S40](https://doi.org/10.1111/cdep.12441), [S12](https://doi.org/10.3386/w27476) | Homeschooling reviews combined with tutoring evidence. | Supports the report's editorial stance and practical framework. | This is a synthesis and editorial inference, not a single direct causal finding. The report labels it as such. | 2026-08-12 |

## Source-level notes

### Greenwood and Stanley

The original article is the primary source for the population, setting, and opportunity-to-respond research question. The exact 400-minute, 250-minute, and 67.5-minute figures are handled as secondary-summary figures because the accessible HSLDA account is the source that presents the chain in the form commonly repeated in homeschool discussions. The report intentionally does not present those values as a national average or as a direct homeschool measurement.

### Duvall

The 2004 ERIC record provides unusually clear design and population information: four elementary students with ADHD, two male and two female, observed in homeschool and public-school contexts with MS-CISSAR and pre/post achievement measures. The report uses it to support a process claim about opportunity for engagement under a low student-to-adult ratio. The report does not use it to claim that homeschooling caused superior achievement or to prescribe a daily duration.

### Pro-homeschool research

The report includes HSLDA and Duvall because the topic cannot be discussed honestly without examining the research most often used by homeschool advocates. It also includes Ray's peer-reviewed review and Valiente and colleagues' broader review to make the evidence boundary visible. The editorial position is favorable to parents' ability to individualize education, not a claim that all homeschool outcomes are superior or that every family has equal resources.

### Legal sources

Legal pages were checked on 2026-08-12 and are included only to show why a global time rule is unsafe. They must be rechecked before any annual edition, family-facing state or country guide, or legal-compliance feature is published.

## Reuse and update protocol

For a future annual edition:

1. Recheck every legal source and update effective dates.
2. Recheck new meta-analyses and systematic reviews in time, tutoring, learning science, sleep, movement, and neurodivergence.
3. Separate new direct homeschool evidence from evidence transferred from school or laboratory settings.
4. Add or retire findings only through a new claim ID or an explicit change note.
5. Keep the old edition and source ledger available so citations remain stable.
6. Preserve the distinction between a family reflection tool and a legal or developmental instrument.
7. Update the suggested citation and report date when the substantive evidence changes.