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The Effect of Teacher's Aides in the Classroom: Evidence from a Randomized Trial

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Teacher's aides are used worldwide, in various school systems, although, there is no strong evidence of their impact on student outcomes. We use a randomized trial to challenge this state of evidence. We randomly allocate 105 schools to two types of treatments - aides with or without a teaching degree - compared to a control group. Both types of aides have positive impacts on test scores and the effects are persistent over time for disadvantaged students. Exploratory analyses of mechanisms suggest that a teacher's aide is not just a class-size reduction, but especially impactful when sharing instructional responsibility for the classroom.

Original languageEnglish
JournalJournal of the European Economic Association
Pages (from-to)469-505
Number of pages37
Publication statusPublished - Feb 2020

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