In addition to our popular lesson plan for middle and high school students, EARTHTIME developed teaching kits to accompany it. The kit is available from EARTHTIME for free (beads, bingo chips, mixing bowl and measuring cup). Any teacher can get one of the kits and they are super useful for teaching how radiometric dating works. First, be sure and download the pdf and the accompanying spreadsheet file. Then order a teaching kit.
After reading and understanding part I of the lesson plan then return here to view the video below. It will help you to better understand parts II and III of the plan.