Here is a small manual that both woodworkers and metalworkers can find useful. "Blueprint Reading" is a short little manual published by the Alabama Community College System. It provides the basics of blueprint reading with a long glossary of terms at the back so everyone is on the same page when interpreting blueprints. Nice little volume, easily printable.
You can download "Blueprint Reading" on my Books - Free Dounloads page. # 23 - 5 MB - pdf