"and" is the most overlooked word in the English grammar. Invariably, when I teach about 'and', the first reaction of my students (beginners AND advanced) is: I know this, it's easy. By the time I finish teaching both beginner and advanced students realize that the proper use of 'and' is "difficult".

Make a lesson plan to teach the use of 'and'.

A very good example was given to me by one student on Monday:
What has four wheels and flies?
Very good material! :)