Is There a Pi in My Cookie? PDF handout takes your students through a fun discovery journey to find the value of pi, as they learn about: diametercircumferenceratioaveragemathematical constantStudents can be placed in a group of four or individually complete this Pi Day activity. I also input the whole class measurements into a Google Sheet and then average everything out at the end of the activity. Although some students' errors will make the rounding a little off, students are amazed to see