Join our CAD community forums where over 25,000 users interact to solve day to day problems and share ideas. We encourage you to visit, invite you to participate and look forward to your input and opinions. Acrobat 3D, AutoCAD, Catia, Inventor, IronCAD, Creo, Pro/ENGINEER, Solid Edge, SolidWorks, and others.
That depends on the drafting standard you are following (ISO? DIN? ASME?), and the type of thread you want to specify. Look in the drafting book you are using in your class - I'm sure it will explain how to do it and have lots of examples.