Day 2 of 3 days...See first day
Leaving blog comments on student posts was a beneficial activity to tie one day's lesson to another.
A Google Shared Spreadsheet was an easy way to gather data from all students.
Once the relationship between Circumference and the Diameter was made students were introduced to the concept of Pi. A lesson is not complete if students don't try to memorize Pi. Two apps helped in this process: Pi Day and Pi Brain