Lesson explains the need for various records and has handouts for students to complete as they research information from a variety of linked sites. Part of the extensive NGPF comprehensive curriculum that is avaiable by creating an account and then being verified. The lessons are very thorough, but do take a bit more time to review, especially when dealing with the calculations required to get some of the answers. If planning to use, be sure to review all parts of the lesson prior to introduction and make adaptations if you need to for time and or content. Extensive deep dives on materials, however, some aspects of lessons can be adapted for level of background, and time constraints.