LearningApps.org is an online interactive platform that allows users to create small interactive modules to support learning and teaching in different areas. These modules can be embedded in other web platforms to accommodate the needs of each user. It allows users to create new modules or use the ones already created. Here are a couple of example ones in French and German.
Learning Apps – Online Interactive Activity Creator
Free - Does not require an account/membership
Take advantage of already created activities or create your own activity from the various types available (requires free membership to create activities). If you have students teach each other certain topics, you can have students create an activity to present the topic to other students.