Spacing content over time and interweaving different content strengthens learning and retention¶

Claim · All claims
Evidence · 1 study · review r? · q2
Currency · newest study 2019 · 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is a peer-reviewed article with a DOI: it rests on a source with no registered publication record (a web page, book or unpublished report).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 3 design pages cite it; treat it as a lead to check, not an established finding.

Subclaims¶

q2 i? The same content spaced over time can dramatically improve learning and retention, and switching between content types is a desirable difficulty that supports durable, flexibly accessible learning. → Digital Promise and the Institute for Applied Neuroscience 2019

Evidence¶

Digital Promise and the Institute for Applied Neuroscience 2019¶

Digital Promise and the Institute for Applied Neuroscience. (2019). Introduction to the Learning Sciences: 10 Key Insights & Practices for Educators. https://digitalpromise.dspacedirect.org/items/d5550311-8f60-4d0d-9d4d-14821054e0e8

q2 · i? · review · r?

A narrative synthesis of learning sciences research states that spaced content improves retention and that interleaving different content, such as "different types of math problems", acts as a desirable difficulty producing more durable learning.

"The same amount of content taught or studied but spaced over time can dramatically improve learning and retention. Additionally, switching between different content (e.g. different types of math problems) requires increased effort for students (a desirable difficulty)"

Discussion¶

Related Claims¶

• Spaced Practice Improves Retention — possibly the same claim (merge candidate)
• Interleaving category examples improves inductive category learning for visual and mathematical materials, but not for expository texts or word categories — possibly the same claim (merge candidate)
• Spaced Retrieval Improves Retention — related
• Spacing out retrieval practice produces better long-term retention than massing it — related
• Learners Misjudge Spacing Benefits — related
• Interleaving benefits are small for mathematical tasks and absent or reversed for expository texts and words — a narrower finding that bears on this claim
• Retrieval practice and spaced retrieval improve achievement and retention by medium amounts, while interleaving helps category learning only for some materials and blocking beats it for words — related
• Retrieval Practice Improves Transfer — related