Taking turns or alternating — doing something in rotation; often used adverbially as かわりばんこに.
子どもたちはおもちゃをかわりばんこに使った。
The children took turns using the toy.
会議では発表をかわりばんこに行った。
At the meeting, the presentations were done alternately (each took turns).
掃除は班でかわりばんこに担当している。
Cleaning is handled in turns by the teams.