In this mind-boggling activity, students condense the history of the cosmos into one calendar year. Current day would be December 31, midnight, and students calculate the number of "days ago" each event occurred - starting with the Big Bang at January 1. This activity includes a student handout with a calendar to label, and list of events and how long ago it occurred, instructions and ratios for solving the number of days for each event, and follow-up questions for students to reflect on the ac
Students practice 1 and 2-digit subtraction with numbers up to 100 while creating a fun image. As they answer questions and color in the boxes, the Mystery Picture is revealed!