If you’ve never used Moodle before, Moodle is a LMS (Learning Management System) similar to Blackboard or Edmodo. Moodle however is an open source platform that can be run and customized by any individual on their personal website. Moodle is great because it is extremely customizable allowing for a variety of different activity types, assignment layouts, and assessment methods.
Plickers are similar to clickers in the way they allow for real-time formative assessment data. Each individual student is assigned a number 1-40 (1-63 in large classrooms) along with a unique QR code-like block for each student.