To create your own Happy Mathematics Day sign, see yesterday’s post.
Want to help your kids learn math? Claim your free 24-page problem-solving booklet, and sign up to hear about new books, revisions, and sales or other promotions.
To create your own Happy Mathematics Day sign, see yesterday’s post.
Want to help your kids learn math? Claim your free 24-page problem-solving booklet, and sign up to hear about new books, revisions, and sales or other promotions.