Details: This poster says at the top Learn to Count and It's as easy as 123! It shows a chart of the numbers 1 through 20, along with a number of items corresponding to the number.
Counting is the mathematical action of repeatedly adding (or subtracting) one, usually to find out how many objects there are or to set aside a desired number of objects. Counting is also used (primarily by children) to demonstrate knowledge of the number names and the number system. Learning to count is an important educational/developmental milestone in most cultures of the world. There is archeological evidence suggesting that humans have been counting for at least 50,000 years. Counting was primarily used by ancient cultures to keep track of economic data such as debts and capital (i.e., accountancy). The development of counting led to the development of mathematical notation and numeral systems.