Puzzles are a hands-on way to explore simpler and complex mathematical relationships, for everyone from kids to calculus students.

Learning a new language requires a lot of time, but not necessarily a lot of money. Whether you're traveling to a foreign country or studying for a class, these are the best free language learning ...

Editorial Note: We earn a commission from partner links on Forbes Advisor. Commissions do not affect our editors' opinions or evaluations. Your savings account should help you grow your money, but ...