Fraction Ordering Tournament

Which set of fractions would be the trickiest to order from least to greatest? Let’s have a tournament!

Place Value (Beyond Base 10)

Place value is something we cover in elementary school. It seems simple, but I’d wager that very few adults really understand the topic. I sure didn’t until I worked with non-base-10 number systems in college. Your students can get a taste of this mind-boggling experience by imagining what it would be like if we didn’t have the number 9. What would each digit represent then?

Math Curiosity: Twin Primes

What do you call two prime numbers who are very close together?