Here is a problem-solving lesson that has learners take the role of a packaging expert to design an inexpensive means of packaging a potato chip. It could benefit from having more specific detail about the lesson itself, but it does make...

Students research a famous scientist or mathematician, design a stamp to honor their work, and write persuasively about why this person and their work should be honored on a stamp.

You can use this international rate calculator provided by the US Postal Service to determine shipping cost for various mailings.