Yelling and education are often mutually exclusive. Teach children what to do calmly but firmly. This serves the latter goal better than incessant tirades which usually are dismissed presently despite their force.
While one must live in the world, he cannot love it. Such is the state of a traveler whose home is somewhere else. He longs for two things: quick passage and sweet return.
The spring of wisdom spouts more from experience than labored thought, if only because it is hard to think about something we would never have thought to think about.