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Among secondary teachers, 61 percent report less time spent tailoring resources and 44 percent less time on lesson planning. Among primary teachers, 61 percent report less time tailoring resources and 59 percent less time on lesson planning, and fewer than one in ten report more time on any task. ERO found that the gains in secondary schools are often offset, since 56 percent of secondary teachers report more time ensuring the authenticity of student work. ERO writes that AI redistributes time from preparation to oversight. The figures are self-reports, no amount of time was measured and the report names no product. ERO published the report in 2026, and the PDF gives no month.","category":"aggregate result","unexpected":false,"purpose":"Generative AI providers built the tools that teachers use to generate text and materials. 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