%0 Journal Article %J Economics of Education Review %D 2022 %T Teaching and Incentives: Substitutes or Complements? %A James Allen %A Arlete Mahumane %A James Riddell %A Tanya Rosenblat %A Dean Yang %A Hang Yu %X Interventions to promote learning are often categorized into supply- and demand-side approaches. In a randomized experiment to promote learning about COVID-19 among Mozambican adults, we study the interaction between a supply and a demand intervention, respectively: teaching via targeted feedback, and providing financial incentives to learners. In theory, teaching and learner-incentives may be substitutes (crowding out one another) or complements (enhancing one another). Experts surveyed in advance predicted a high degree of substitutability between the two treatments. In contrast, we find substantially more complementarity than experts predicted. Combining teaching and incentive treatments raises COVID-19 knowledge test scores by 0.5 standard deviations, though the standalone teaching treatment is the most cost-effective. The complementarity between teaching and incentives persists in the longer run, over nine months post-treatment. %B Economics of Education Review %V 91 %G eng %U https://doi.org/10.1016/j.econedurev.2022.102317 %N December