Use Refill Earth With Your Class
Set up a classroom group, invite students, choose from the existing question library, and turn each round into shared progress your class can compare over time.
Create a Classroom Group
Sign in with a verified account, open Groups, and create an invite-only group for your class. Give it a clear name, then use its private invitation controls to manage who joins.
Invite Students
Share the group’s rotatable invitation code or link with students. Students can play the quiz anonymously, then use a verified account when they are ready to join the group and save progress to it.
Choose a Grade and Category
Use the existing question library to match a round to your class. Select a grade band and category such as water science, climate, oceans, conservation, or AI and data-center water.
Play and Fill Cups
Every correct answer adds ten drops. Five correct answers fill a cup, and signed-in totals contribute to the active group selected by each player.
Compete With Groups Worldwide
Compare group name, rank, drops, and cups on the public group leaderboard. Classroom groups can compete with clubs, families, schools, and communities without exposing invitation codes, emails, or member lists.
Track Class Progress
Return to the group page to see aggregate totals, responses, accuracy, and category patterns. Use those class-level patterns to choose the next grade band or category for another round.
School resources
Create a group, choose questions from the library, or review the classroom privacy approach.