The biography of the ancient Greek mathematician and librarian, Erastothenes, who measured the circumference of the earth, with an error of only 200 miles, at a time when people didn’t even know for sure the earth was round, using math alone. There is a complete set of teaching ideas for this book at dianacruchley.com.
- My stories about going to the library, taking out books, reading on a tablet.
- Eratosthenes had the nickname Pentathlus meaning champion in 5 contests – in his case intellectual ones. Talk about championships (or near championships) in your life. What are your major intellectual “championships?” Why?
- Eratosthenes’ nickname was Pentathlus. Talk about nicknames – yours, others, opinions about nicknames, etc.