I've worked here for over 3 years and every morning I am grateful to be here. Scholastic is a mission driven company and very family friendly. There a tons of smart, creative people and some women in top positions, though mostly men. It's not the most dynamic, cutting edge place, so you shouldn't stay too long because you will fall behind. But for a certain phase of a working mom's life, this is the place to be.
Amazing maternity leave and very accommodating if you have children (at least my dept). Good work/life balance. There are women in management roles but upper Management is male-dominate and they have been with the company for decades. It makes it difficult for women to have a strong voice since the practices of these higher-ups is very dated.