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Within each school and grade, half of 48 math classrooms were assigned to the Guided Learning feature in the Gemini app. From 6 October to 5 December 2025, teachers were asked to lead two of four weekly math periods with it. Students worked in pairs on shared tablets or computers. The other classrooms continued standard instruction. Oxford MeasurEd developed the tests and scored them without knowing students' assignment. In a report of 15 May 2026, the authors state that Guided Learning raised math scores by +0.258 standard deviations after adjustment for baseline scores. Without that adjustment, the estimate was 0.216 standard deviations and not statistically significant. Students with stronger baseline skills gained more. Google staff wrote the report with Fab AI, and Google.org and the Gates Foundation supported the work. 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Within each school and grade, half of 48 math classrooms were assigned to the Guided Learning feature in the Gemini app. From 6 October to 5 December 2025, teachers were asked to lead two of four weekly math periods with it. Students worked in pairs on shared tablets or computers. The other classrooms continued standard instruction. Oxford MeasurEd developed the tests and scored them without knowing students' assignment. In a report of 15 May 2026, the authors state that Guided Learning raised math scores by +0.258 standard deviations after adjustment for baseline scores. Without that adjustment, the estimate was 0.216 standard deviations and not statistically significant. Students with stronger baseline skills gained more. Google staff wrote the report with Fab AI, and Google.org and the Gates Foundation supported the work. 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