This document provides an overview of key concepts and debates in media theory, structured as a toolkit. It covers topics such as texts and literacies, analyzing still and moving images, debates around audiences and effects, concepts of ideology and power in media, and emerging perspectives on media 2.0 and participatory digital media. The document uses examples, concepts, and theories to illustrate different analytical approaches to understanding media. It aims to equip readers with a range of theoretical lenses for interpreting and critiquing media texts.