#XArt circle finale! Skip-counting 2 (yellow), 5 (blue), & 13 (orange). What do you observe? @CampbellAPS @APSArts…
#XArt circle finale! Skip-counting 2 (yellow), 5 (blue), & 13 (orange). What do you observe? @CampbellAPS @APSArts… https://t.co/rBwcSksW2z