My school had a drafting/shop class, but this sounds like it's only a drafting class.  Not sure what the metal construction entails but if you're able to learn some soldering or even welding, it may come in handy later in life.  Soldering is a handy little skill to have.  I can make two pieces of metal stick together with an arc welder, but it's not pretty, most people don't have a welder in their garage but a little torch is easy to store.