I used these economy charts each week as my students tried to earn dollars and avoid debits! What is so simple about this is that you actually don't need any dollars! All you need is to give each student a mini-notebook (I found some for CHEAP at Walmart!). Each week, I gave each student a chart to glue into their notebook and then I used tally marks under each column for students who earned money or owed me money. Make sure to use a particular color of pen! At the end of the week, students added up their weekly money and calculated a new total. Students saved up their money for a month and then used their money to buy fun rewards at the end of the month.