This Excel file is a great way to drill 10-Key in a keyboarding class or math class, as well as re-enforce how to do formulas in Excel. The file is protected in such a way that students are unable to use Excel functions or autofill as a shortcut. They need enter an = sign followed by the numbers shown and the operation, then press enter. If their answer is correct, it will be blue and they will receive a check mark. This method allows students to self-correct and makes grading much simpler for t