I created this activity to help my students understand groups. Armed with a Periodic Table, my students worked together to locate the group of each element and then able to find out which one does not belong.
The constant feedback I received from my students was they understood groups and loved that it was a hands on activity. That same day I had a student who missed 20 minutes of class and the explanation of what groups were. He jumped right into the activity and was able to understand by the end of the lesson.
If you have any questions or concerns about this activity please do not hesitate to ask!