I use this chart while teaching Explorers to Middle school students. Students will fill-in in important information about 16 explorers. I use Edu. Helper readings on individual explorers to teach students about each of them. We discuss them and answer comprehension questions about them and then fill-in our chart. Whatever information is left blank at the end of the unit, students have one class period to research answers on the computers. To introduce the unit I used a web quest I found online. Some students go back to the videos in the web quest to answer questions on their charts.