1. Annotation (Mark it) - digital ink and shapes over text and images (SMART Ink, Apple Preview, Google Keep, Skitch, AWWapp.com)
2. Classification (Drag it) - moving objects to labeled categories (Google Drawings Templates, Google Slides, PowerPoint)
3. Hide and Reveal (Reveal it) - erasing digital ink, layering objects, manipulating colors of text and background, animation
4. Games that combine the above - SMART lab,Plickers, Kahoot!, SMART Exchange game templates, online game creation websites like Jeopardylabs.com