A simple app that allows students to provide multiple-choice feedback in a live classroom or conference setting using bright, visual "A-B-C-D" cards (with a "dont-know" option as well). This app is intended to replace or supplement the use of printed colored-paper cards which have been in use for several years.
This app helps support the work of the CAPER team (Center for Astronomy & Physics Education Research), caperteam.com.