Zondle is a free online and mobile platform that uses game-based learning to engage students and enhance learning. It allows teachers to create questions on any subject or level and incorporate them into over 60 game formats. Students can play teacher-created games to review material and track their progress over time. Research suggests that Zondle's gamified approach can improve memory encoding and knowledge retention compared to traditional methods. The platform provides a large question database and customizable games to help teachers facilitate learning in fun ways.