In honor of Pi day, I wanted to find some comparison problems involving circumferences and areas of circles. 6th grade Sinapore Math has a whole chapter devoted to "Circles," so I turned next to the 6th grade Everyday Math curriculum. To my surprise, there isn't a single problem in the entire curriculum involving circle area and circumference. Only within the sections on "data" does the circle make a brief cameo--but without its transcendental straight man:
I. The only circle-related problems in the 6th grade Everyday Math workbooks (Student Math Journal, Volume 1, pp. 41-42; p. 190):
II. The final problem set in the Circles chapter in the Singpoare Math Primary Mathematics 6B Workbook (pp. 36-37):
III. Extra Credit
Is it right to prefer "data" to Pi?
Should circles in 6th grade be restricted to straightforward, single-step Percent Circle and protractor problems?