Coins
Usually metal.
Used for money.
In America the government authorizes these denominations.
Common coins in the United States.
Metal
copper nickel silver silver
Worth
1 cent 5 cents 10 cents 25 cents
Called
Penny Nickel Dime Quarter
Sometimes see
Metal
Silver Silver
Worth
50 cents $1.00
Called
Half Dollar Susan B. Anthony Dollar
http://etc.usf.edu/clipart/galleries/math/half_dollar.php
http://www.usmint.gov/?flash=yes
http://www.myschoolhouse.com/courses/O/1/11.asp
http://www.myschoolhouse.com/courses/O/1/38.asp
http://www.apples4theteacher.com/java/counting/money.html
http://www.canteach.ca/elementary/songspoems70.html