Didactics, schooling, instructional activity, instruction, pedagogy, instructing - the things to do of educating or instructing; routines that impart know-how or skill; "he acquired no official instruction"; "our instruction was cautiously programmed"; "very good classroom training is seldom rewarded" Say cheese! Can your class take an excellent Photograph and measurement https://www.youtube.com/watch?v=RSlwOZLlUGg