Tandem

Tandem refers to two or more things working together or in sequence. In language learning, it describes a method where two people, often speakers of different languages, practice with each other—each helping the other improve their language skills. The idea is mutual benefit: one person teaches their native language, while learning the other's. Outside language learning, "tandem" can describe gears, bicycles, or activities that involve two components or participants functioning in harmony. Overall, it signifies collaboration or a paired relationship that enhances effectiveness through cooperation.