I have worked with and trained teenagers to give change for 20 years. I have never come across someone who could not count change. I'm glad none of you have ever made a mistake, ever, but not all of us are that perfect. I'm sorry you have occasionally been given incorrect change. That does not mean we should do away with calculators. I personally carry a cell phone in my pocket, so I do have a calculator at all times. I have never been in a business that has typewriters instead of computers. Those days are gone. Insulting an entire generation and the entire school system through out the country seems a bit extreme for a simple mistake.