Main ideas are explained and devoloped with supporting details.
Supporting details give readers supporting facts, details, and examples to support a main idea, or a point that the author wants to get across. Main ideas are not effective without supporting details. You can not have supporting details without a main idea to support.
He should use a hands on, interactive approach where the audience gets to try using the computer buttons and features. Your text will have a word that means hands on or interactive.
