Rori — an AI math tutor on WhatsApp in Ghana
Ghana
A conversational maths tutor delivered over WhatsApp: a Ghana RCT found an effect size of ~0.37 (≈ an extra year …
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Evidence: Quasi-experimental Top 17% 67/100 · Ask Evidence Copilot about this practice
A maths intelligent tutoring system rooted in decades of Carnegie Mellon cognitive-science research; the US What Works Clearinghouse rates its effects as 'mixed' — a candid benchmark for ITS.
MATHia (formerly Cognitive Tutor) is one of the longest-standing intelligent tutoring systems, built on Carnegie Mellon cognitive-science research and paired with a classroom curriculum.
To improve student mathematics achievement through an adaptive, cognitive-science-based intelligent tutoring system.
The US What Works Clearinghouse reviewed dozens of studies and concluded the effects on maths achievement are 'mixed' under its rigorous standards — several studies show positive effects, at least one negative.
That candid, independently-reviewed record of mixed results is exactly the kind of transparent evidence Evidoria values, and MATHia is included as a mature, transparently-evaluated intelligent tutoring system.
Implementation detail (cost, timeline, staffing, conditions for success) is not yet available for this practice.
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Where this practice's information was retrieved from, and when.
Ghana
A conversational maths tutor delivered over WhatsApp: a Ghana RCT found an effect size of ~0.37 (≈ an extra year …
India
An adaptive learning system rigorously evaluated by MIT's J-PAL: students gained 2–2.5× the control group's progress in maths and language …
Germany
Germany's bettermarks AI-adaptive maths platform — statewide in 9 of 16 federal states, ~500,000 students — got its most rigorous …
Kenya
EIDU pairs teacher training with an AI-adaptive app that personalises literacy/numeracy practice for Kenyan public pre-primary pupils. A cluster-RCT across …
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