Monaco (2018) describes the "Explore" project for which groups of students study specific economics concepts to, then, teach these concepts to the rest of the class. The method emphasizes collaboratives learning, and because students become developers of their own learning, it allows for more confidence in the studied material. In the words of the author: "A student who grapples with a difficult concept, then has an “Aha!” moment of their own making will be more confident at the next difficult concept they encounter.
Besides providing a detailed implementation strategy, Monaco (2018) provides resources to implement multiple different projects for Microeconomics courses. Such a strategy may be used for various class sizes, including large ones. Costs and benefits of implementing "Explore" projects are clearly stated in the paper.