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Teachers in the ChatGPT group were asked to use ChatGPT to prepare lessons and resources and received an online guide. Teachers in the other group were asked not to use any generative AI tool for this work. In weeks six to ten, a typical teacher in the comparison group spent 81.5 minutes a week preparing these lessons and a teacher in the ChatGPT group spent about 56.2 minutes, a saving of 25.3 minutes a week, or 31 percent. An expert panel that did not know which group made each resource found no evidence that the quality of the resources differed. Teachers used ChatGPT mostly for one or two activities per lesson, such as quizzes or new activity ideas. The trial measured teacher time and resource quality and did not measure student learning. NFER published the results on 12 December 2024.","category":"general benefit","unexpected":false,"purpose":"ChatGPT is a general-purpose chatbot. In this trial it was used to help teachers prepare lessons, and the time saving was the purpose of the trial.","system":"ChatGPT, used by science teachers with an online guide to prepare Key Stage 3 lessons and resources","model_version":null,"developer":"OpenAI","deployer":"Science teachers in 68 schools in a trial funded by the Education Endowment Foundation and the Hg Foundation and run by NFER","location":"United Kingdom (68 schools that the summary does not name)","domain":"Education","segment":null,"benefit_type":"Reduced Task Time","taxonomy_note":null,"registry_ids":{},"ratings":[{"group":"personal","depth":1,"reason":"Teachers in the ChatGPT group saved 25.3 minutes a week on lesson preparation for Year 7 and Year 8 science."},{"group":"organizational","depth":1,"reason":"Schools saw lesson preparation time fall by 31 percent with no evidence of lower resource quality in a blind expert review."}],"ai_role":{"status":"assessed","statement":"Schools were randomly assigned to a group that used ChatGPT and a group that used no generative AI, so the time difference reflects ChatGPT use together with the online guide."},"evidence":[{"kind":"report","citation":"Roy P, Poet H, Staunton R, Aston K, Thomas D. 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