It's a bit repetitive with needless feminist undertones. However, the subjects such as a growth mindset*; the ineffectiveness and harmfulness of grades and the segregation of student by performance; the uselessness of rewarding rote learning and computation; and practice examples make the book worthwhile for anyone interested in teaching, math, children, neuroscience, and psychometrics.

edit:
*The growth mindset could've been based on biased and faulty research; however, the latest study has some important limitations: https://educationendowmentfoundation.org.uk/public/files/Projects/Evaluation_Reports/Changing_Mindsets.pdf, https://en.wikipedia.org/wiki/Carol_Dweck#Criticism