Professional development needs roughly 50 hours in a specific area, and long-term content-specific support outperforms one-shot sessions¶

Claim · All claims
Evidence · 1 study · review r3 · q2
Currency · newest study 2017 · checked against its sources 2026-10-13 (automated, 1 of 1 entry) · not reviewed by a person
Evidence quality · No study behind this claim is a peer-reviewed article with a DOI: it rests on a source with no registered publication record (a web page, book or unpublished report). It is kept because 4 design pages cite it; treat it as a lead to check, not an established finding.

Subclaims¶

q2 i? Darling-Hammond and colleagues suggest professional development must consist of roughly 50 hours in a specific area to affect teaching and learning. → Tina Ehsanipour & Florencia Gomez Zaccarelli 2017 q2 i? Long-term, content-specific support has more effect on teacher pedagogy and student learning than one-shot sessions. → Tina Ehsanipour & Florencia Gomez Zaccarelli 2017

Evidence¶

Tina Ehsanipour & Florencia Gomez Zaccarelli 2017¶

Tina Ehsanipour & Florencia Gomez Zaccarelli. (2017). Exploring Coaching for Powerful Technology Use in Education. Center to Support Excellence in Teaching - Stanford University. https://digitalpromise.dspacedirect.org/items/2f8e7466-5d96-49c4-b8cc-5b70690e0db9

q2 · i? · review · r3

The paper cites Darling-Hammond et al. (2009), a nationwide survey finding 59% of teachers rated content-related professional development as useful or very useful, and argues one-shot sessions are not as impactful as consistent, content-specific opportunities.

"Darling-Hammond, Wei, Andree, Richardson, & Orphanos (2009) suggest that in order for professional development to have an impact on teaching and learning, it must consist of roughly 50 hours in a specific area ."

Studies bearing on this claim¶

How much professional development, over how long, before teaching and student results change? This table gathers the studies behind this claim and the 5 narrower claims that bear on it: 5 distinct studies (3 associational, 1 review, 1 causal), q2, 0 of 5 with an effect size coded. One row per study, codes as each entry records them; no effect is averaged and no verdict is drawn. Built by scripts/synthesize_claim.py from eval/synthesis/; a row that looks wrong is fixed on the claim it comes from.

Discussion¶

Related Claims¶

• Pairing coaching with group trainings is associated with larger effects on instruction and achievement; instructional materials with larger, and video libraries with smaller, effects on instruction — the general claim this finding bears on, with the studies behind it
• Sporadic, disconnected professional learning does not change practice long term, whereas well-structured programs can build differentiation skills with positive student outcomes — related
• Full Algebra Toolkit implementation requires roughly 14–22 hours of educator time across PD sessions, preparation, and classroom implementation — related
• Teachers receiving 11 or more hours of training on integrating digital content report almost double the reliance on software and the Internet compared with untrained teachers — related
• In one survey, coached teachers more often report sustained, followed-up professional development than non-coached peers, and more than 81% received at least 30 minutes of one-on-one coaching a week — a narrower finding that bears on this claim
• Students whose teachers attended one or two PLI professional learning courses gained more on SBAC, with larger gains for two sessions than one — a narrower finding that bears on this claim
• In elementary grades, students in schools with extensive standards-related professional development reported significantly larger improvements in academic demand, rigor, instructional clarity, and teacher support than students in schools with limited professional development — related
• Professional development frequency shows no significant relationship to didactic teaching, while quality and basic-skills content do — related
• Teachers need professional development geared specifically to the curricula they teach, not only generic teaching skills or general content knowledge — a broader claim this one bears on
• Active learning opportunities in professional development moderate gains in teachers' skills, with alternating input-praxis design far outperforming blocked design for teaching-method use — related