Touchstone, together with Viewpoint, is a six-level English program, based on research from the Cambridge English Corpus. Touchstone Second edition Presentation Plus, Level 4 can be used with an interactive whiteboard or with a computer and a projector. Teachers can present the pages from the Student's Book, Workbook, and Video Activity Pages, play the Class Audio and the Video Program, and display scripts and answer keys. Tools allow teachers to zoom in, annotate pages, and add custom links to other material.