Reading Mastery has potentially positive effects on reading fluency for adolescent learners, with a WWC improvement index of +19 percentile points¶

Claim · All claims
Evidence · 1 study · causal r2 · q3
Currency · newest study 2010 · checked against its sources 2026-10-18 (automated, 1 of 1 entry) · not reviewed by a person

Subclaims¶

Reading the evidence codes

q is the design tier, i the impact, n the sample, and the kind with its r the rigour judged within that kind: what each code means.

This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.

q3 i? For the reading fluency domain, one study showed substantively important positive effects of Reading Mastery on adolescent learners. → What Works Clearinghouse 2010

Evidence¶

What Works Clearinghouse 2010¶

What Works Clearinghouse, U.S. Department of Education. (2010). WWC Intervention Report: Reading Mastery (Adolescent Literacy). http://www.mcgraw-hill.co.uk/sra/downloads/Reading%20Mastery/Reading%20Mastery%20Signature%20Edition%20Brochure.pdf

q3 · i? · causal · r2

A randomized controlled trial (Stockard, 2010) comparing 29 Reading Mastery Signature Edition students with 28 control students taught the Scott Foresman Basal Reading Program. The study authors found "statistically significant positive effects" on AIMS Web words read correct; the WWC improvement index for reading fluency is "+19 percentile points for a single finding from one study."

"Stockard (2010) found statistically significant positive effects of Reading Mastery on the AIMS Web Curriculum-Based Measurement Words Read Correct for 4th graders."

Discussion¶

Learner Variables¶

Reading and Language — outcome: instruction changes it
Reading Fluency — outcome: instruction changes it

Page metadata

Field	Value
`type`	`claim`
`id`	`reading-mastery-potentially-positive-fluency-adolescents`
`title`	`Reading Mastery has potentially positive effects on reading fluency for adolescent learners, with a WWC improvement index of +19 percentile points`
`description`	`Reading Mastery has potentially positive effects on reading fluency for adolescent learners, with a WWC improvement index of +19 percentile points`
`status`	`review`
`evidence_strength`	`moderate`
`newest_evidence`	`2010`
`source_checked`	`2026-10-18`
`generated`	by `process:wiki-ingest` on `2026-10-07`
`trust`	unverified — no one has confirmed this page's content
`sources`	1 — `what-works-clearinghouse-2010`

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