“That assumption—that labeling and sorting children based on gender doesn’t really matter as long as everyone is treated fairly—would hold true if children only paid attention to the more overt, obvious messages we adults send. If children only listened to our purposeful messages, parenting would be easy. Most (but not all) parents and teachers take great effort in treating their children fairly, regardless of gender. Parents don’t need to say to their daughters, “You probably won’t enjoy math” or say to their sons, “Real boys don’t play with dolls.” Most parents wouldn’t dream of saying these blatant stereotypes to their kids. But research has shown that when we label (and sort and color-code) by gender, children do notice. And it matters—children are learning whether you mean to be teaching them or not.”