At our Fablab we use mostly Corel Draw for our 2D Drawings and solid works or Rhino for 3D design.
Opening a new page on Corel Draw, and ensuring that we are working on the cirrect measuring units
Drawing on Corel Draw, learning to draw lines and boxes and making them to scale
Learning to open a solid works file and drawing
Drawing a box in solid works and using the various tools to draw to scale