This is an activity where students make a timeline to scale for all of Earth's history. This goes along with the printable classroom timeline on TPT. Students measure printer paper using meter sticks to note where all major eons and eras are on the timeline and where key events in Earth's history take place. In the directions I use old printer paper with perforated edges, but you can have students tape paper together or cut from large rolls if you have them. They then use the internet or the iPad app "NHM Evolution" to find out more about the events so they can fill the timeline with pictures. I use this as an introduction to evolution.