Reference
US Coins Reference Chart - I made this up recently for my daughter's "math office" reference board.
Manipulatives
Play Money - I made this printable up when we lived overseas and I couldn't find US money coins and dollars very readily. Has $1, $5, $10 $20, $50 and $100 bills and pennies, nickels, dimes, and quarters.
Lessons
Pennies, Dimes, and Dollars Lesson - this is a lesson I made up for one of my older kids when they were in the 3rd grade. It has activities, a few worksheets and handwriting practice for writing coin names and amounts.Games/Online Practice
- ABCYa Learning Coins - nice introduction to money and then a coin sorting activity
- ABCYa Counting Money - activities
- http://interactivesites.weebly.com/money.html - lots of interactive math activities, including Do I Have Enough Money and Money Bingo (and lots more)
- Smarty Games - Dollar Store - pull a toy from the store by dragging the correct amount of change to pay for the item.
- A+ Math Online Money Flashcards -these aren't really flashcards in my opinion but an amount of money is shown in bills and coins and student types in the amount shown.