Here is a project that goes along with my "Hanging Timeline" on TPT. Students make posters on various evolutionary events that can be hung from a classroom timeline. They can do this research on the iPad app NHM Evolution or use the internet. There are enough events for two classes of 30 so each student has a unique event. Each event is color coded: life events, extinction events, and geologic events. If you have more students you can always add more events!