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U.S. Supreme Court · 2017
580 U.S. 386 (2017)
Held that to meet its substantive IDEA obligation "a school must offer an IEP reasonably calculated to enable a child to make progress appropriate in light of the child's circumstances" -- a standard "markedly more demanding than the 'merely more than de minimis' test," because "a student offered an educational program providing 'merely more than de minimis' progress from year to year can hardly be said to have been offered an education at all." A child's program "must be appropriately ambitious in light of his circumstances," and "every child should have the chance to meet challenging objectives." The Court declined to set a bright-line formula.
Later courts cite it without significant positive or negative signal.
Treatment last confirmed July 18, 2026. Case-wide subsequent treatment; human-set. Not specific to any one passage.
Explicit, systematic phonics-based (structured literacy) instruction improves foundational reading and spelling for students with or at risk for reading disabilities, including dyslexia; it is the reading-disability treatment approach with the most clearly confirmed efficacy in randomized trials, with moderate effects largest on decoding and word reading, smaller on comprehension, and stronger when begun early.
For students with disabilities, inclusive placement in general-education settings is associated with academic and access outcomes at least equal to — and for some groups better than — segregated special-education settings, with no consistent harm to social-emotional outcomes or to classmates without disabilities; but the evidence is observational, heterogeneous, and confounded by selection, so effects are small and depend heavily on the quality and support of the setting rather than placement itself.
Early intervention for infants and toddlers with or at risk for developmental disabilities and delays (the birth-to-three window served by IDEA Part C) improves developmental and functional outcomes — especially when intensive, structured, and family-centered — though effect sizes vary by domain and disability and the strongest gains are on proximal, targeted skills.
Early intensive behavioral and developmental intervention for young children with autism (e.g., ABA-based EIBI and the Early Start Denver Model) improves IQ, language, and adaptive behavior relative to treatment as usual, with larger gains at higher intensity and earlier start; effects on core autism symptoms are smaller and more variable, and individual response differs widely.
Stimulant medications (methylphenidate, amphetamines) produce moderate-to-large short-term reductions in core ADHD symptoms and improve on-task behavior and work completion in children; but effects on actual academic achievement and learning are small, long-term benefits are not established, and the certainty of the symptom evidence is limited by pervasive unblinding from recognizable side effects.
Explicit, systematic instruction — clear modeling, guided practice, scaffolding, and frequent feedback — is among the most reliably effective approaches for teaching academic skills to students with learning disabilities, with moderate-to-large effects replicated across half a century of research in reading and mathematics.
Social-skills interventions for autistic children and youth produce small-to-moderate gains on rated and tested social skills, but improvements often reflect social KNOWLEDGE more than real-world social PERFORMANCE, generalization and maintenance across settings are weak, and effect sizes shrink under more rigorous designs and independent informants.
Computerized working-memory training (e.g., Cogmed) reliably improves performance on the trained and closely similar memory tasks (near transfer), but multiple high-quality meta-analyses and randomized trials show it does NOT produce meaningful or lasting improvements in general cognitive ability or academic achievement (far transfer).
Early intensive behavioral intervention based on applied behavior analysis (ABA) is associated with gains in IQ, language, and adaptive behavior for some autistic children, and older meta-analyses report medium-to-large effects; but the most rigorous and independent syntheses (Cochrane; RCT-restricted, bias-adjusted analyses) find the evidence weak and the summary effects largely attenuated, adverse effects are poorly monitored, and outcomes meaningful to autistic people are seldom measured.
Peer-mediated interventions — training typically developing peers to model and prompt social interaction — reliably increase the social interaction of autistic students in inclusive settings and are among the better-supported social interventions, though effects are strongest for increasing interaction frequency and weaker for child-initiated social bids, with generalization and maintenance less consistently demonstrated.
Systematic phonics instruction — explicitly teaching grapheme-phoneme correspondences in a defined sequence — improves early reading, especially decoding and word reading, with the largest benefits for younger children and for students at risk for or with reading disability; it is an essential component of effective beginning reading instruction.
Prenatal alcohol exposure causes a dose-related spectrum of neurodevelopmental harm — lowered IQ and deficits in learning and memory, executive function, and attention regulation, with or without facial dysmorphology — and is a leading preventable cause of developmental disability; no safe level of alcohol use during pregnancy has been established.