Bedtime Math: The Truth Comes Out (Bedtime Math Series Book 3)
Kindle电子书
US$11.99 was: US$18.99
Laura Overdeck has a BA in astrophysics from Princeton University and knows numbers. Since she enjoys them so much, she (along with her husband John) decided to give their three children math problems instead of bedtime stories, and BEDTIME MATH was born. Visit her on the Web at bedtimemath.org.
阅读完整简历