In my classroom I used "Gogo-bucks" (My last name is Gogolew) as part of a token economy. Every Friday my kiddos would "go to the bank" and deposit their bucks in order to see what they could purchase within the classroom. Have fun with naming your currency for your classroom!
I printed these out on cardstock and laminated them to be reused. They held up very well!
I put the posters up in my classroom as a reference for my students.