https://www.skillshare.com/en/classes/proportion-and-alignment-urban-sketching-techniques/2010428433

This course will teach you the proportion and alignment drawing techniques to draw more accurately from observation.   You will learn how to size what you draw so that you won't run out of space on your paper, or draw too small on your paper. You will learn to draw everything in proportion in relation to the space and all other objects in the scene. Angle measuring techniques will also be taught so that you can draw challenging perspective lines accurately.  This course can be a standalone course or a complement to other urban sketching courses that I've created.   The tools you'll need are just a pen/pencil or paper. There will not be any colouring in this lesson although you can always colour your work of course.