Which principle is being applied?

Below are listed a number of teacher and student actions. Consider the impact of each one on student learning, then determine which principle of UDL it demonstrates. When you have made your decision, drag each action into the appropriate column. If you prefer, you can also do this activity using a form with radio buttons. Some browsers may work best with (or show only) one or the other format; use the one that works best for you.

Actions UDL Principles: Multiple Means of...
Representation Action & Expression Engagement
Student works with peer mentors on interest-based projects.
Teacher uses large print for instructional visual aids.
Student uses interactive poster creation tools (Glogster) to share information.
Student engages in authentic and purposeful scenarios when learning content.
Student interacts with virtual guest speakers on topics of high interest.
Teacher uses closed captioning when presenting audio information.
Student receives mastery-oriented feedback on relevant/purposeful projects from teacher.
Student engages in authentic project-based learning.
Teacher uses text-to-speech during instruction.
Teacher uses electronic books as instructional resources.
Student shares interests, thoughts, discussions with electronic pen pals.
Student uses trackballs for typing assignments.
Teacher uses color and contrast in text for instructional materials and visual aids.
Student uses video-making tools (Animoto) to share ideas.
Student views live webcams of current/relevant events.
Student uses comic-making tools (ToonDoo) to share ideas.
Student participates in educational competitions (USFIRST, etc.).
Student learns in "sensory aware" classrooms.
Student uses collaborative brainstorming (Bubbl.us) to gather and discuss ideas.
Student uses graphic organizers to organize thoughts and ideas.
Student uses choice (Tic-Tac-Toe) boards to select activities based on interest/preference.
Student creates digital books (Book Builder) to share information.
Teacher uses avatars (Voki) to share information.
Teacher uses visual dictionaries as instructional resources.