There are numerous resources and lesson plans available from this website to help you if you are planning music lessons.
Here is a listening activity to help with showing students about Mozart.
Before beginning this activity with the class, write a selection of emotions/moods on individual small pieces of paper (e.g. frightened, perplexed, rolling on the floor with laughter, chilled out, just been stung by a bee etc.) You could even come up with these as a class. Now choose a short phrase such as “I think it might rain”. Choose students to come out and randomly pick one of those pieces of paper. They must then say that phrase in the mood or emotion that their paper suggests, using changes of pitch, body language and speed of speech to best represent it. The class tries to guess which emotion the chosen student was acting out. Try as many of these as possible.
Now discuss how a single melody can be altered to give a variety of effects. Music that does this is called a set of “Variations”.
Listen to a very short excerpt from the very beginning of Mozart’s 12 Variations and identify what we know this song as today (Twinkle, Twinkle Little Star). Have the students make a chart showing each variation and what was different about each one.
Which one did they like the best? Have a class discussion about the piece.
Piano Concerto no. 21 2nd movement: Andante