When Liliana has her first day at a new school, she’s nervous about making new friends, and a math problem in her class doesn’t help. After she shares her abuela’s strategy for solving the problem, some of her classmates don’t understand or think her way is wrong. Liliana’s teacher, Ms. Edwards, asks her friend Marcia Ascher, a professor and mathematician, to describe to the students how different cultures have their own ways of doing math. In Knotting Numbers, you can learn alongside Liliana and her classmates as Professor Ascher explains that there isn’t always just one...