This practical handbook provides a well-founded insight into the complex preparatory work for the realisation of eLearning projects. The book describes how project managers and media authors work as a team to create a script for eLearning that fulfils learning psychology criteria and current multimedia didactics. Tools for designing and writing scripts are presented and evaluated so that a needs-based selection is possible. The third edition has been revised and updated throughout. A new chapter on "Mobile Learning" shows the latest developments. The draft of instructional videos and the possibilities of the social web are explained in detail.