In large lecture spaces it can sometimes be difficult to encourage students to speak up. Sli.do provides an platform for students to ask questions, either anonomously or not, which can then be viewed and upvoted by others in the group.
Sli.do has a free to use function which can be used with up to 1000 participants. The paid for versions give you some extra features and control.
Interested in other tools for classroom interactivity? Check out our other #1minuteCPD videos.