This article focuses on a widely used method in developmental and education research in majority world countries: large-scale impact evaluations and randomized controlled trials. We build on our experience implementing such programs in majority world countries, primarily in West Africa, and reflect on our experiences to propose a set of best practices in maintaining equity and justice in collaborations between majority and minority world countries. These include prioritizing research-policy-community partnerships, promoting complementary research approaches, considering measurement timescales, and capacity exchange approaches. (PsycInfo Database Record (c) 2024 APA, all rights reserved).