This document lists 100 ideas for exploiting and varying language activities in the classroom with minimal preparation time. The ideas include activities done alone, in pairs, in groups, or as a class using speaking, writing, listening, reading, images, and realia. Some examples given are mini whiteboards, gallery walks, translating conversations into the students' native language, and changing wording of conversations to create new meanings. The document also recommends a webinar on creating student engagement through competence, autonomy, relationships, and action. Overall it provides a large bank of low-prep ideas to make language activities more interactive, varied, and engaging for students.