Halloween Bilateral Symmetry Art Project: CCSS 4.G.3 Halloween Bilateral Symmetry Art Project: CCSS 4.G.3 September 9, 2012 Karyn Comments 0 Comment www.FamilyMathNight.com Super simple, and super fun. Great way to introduce bilateral/mirror symmetry. I usually do this with fourth graders but I think third graders could probably do it, too. CCSS: 4.G.3