I use this as an introduction to Historical skills for my 7th graders and it works really well. Students are given background knowledge and then handed the 13 sources in order. As they receive them they discuss what can be inferred from each piece of evidence and complete the history mystery grid. This is a great lesson designed to get students thinking and handling evidence. I hope your students enjoy it as much as mine do! It also works really well as a transition lesson for students coming to high school and perhaps studying History as a specialist discipline for the first time. This activity sets students up really well for a piece of follow up Historical writing.