Use an almanac or an encyclopedia
to discover how the months were
named and why they have different
numbers of days.
If you had been born
on February 29, how many birthdays
would you have had by this year?
Thirteen may be a lucky number
for the USA. Think of at least one reason why.
Study a dollar
bill to see if you can find "13"
objects in common.
Use an almanac
or an encyclopedia to research why the number
13 is considered by some to be unlucky.