No doubt you’ve run into many screensharing apps that connect a teacher computer to iPads.
Join.me is a free screen sharing meeting site that is simple to facilitate. This can be used to enhance a lesson by sharing the teacher’s computer screen with student ipads [imagine the possibility of a student with visual challenges being able to participate fully in the lesson]. When the teacher wishes to share the screen, they go online to join.me and downloads a tiny exe – file to launch a session. A number is generated to be shared with the students to create the connection. The student ipads must have the join.me app already installed. [Thanks to Debbie Sitar for suggesting this!]