Musical form for kids: ABA, rondo, and theme and variations

Form is the plan of a piece of music. It tells you which part comes first, which part comes back, and which part is new. Musicians label the parts with letters. The first tune is A, the next new one is B, and so on. Once a child can hear “that tune is back,” the child can hear form.

The five forms to know

Form	The plan	In plain words
Binary	A B	Two parts
Ternary	A B A	A tune, something new, and the tune again
Rondo	A B A C A	One tune keeps coming back, with new parts between
Theme and variations	A, A1, A2, A3	One tune, changed a little more each time
Sonata form	Tunes, a journey, tunes again	Two tunes are set out, taken apart, and brought home

AB: two parts

The music has a first half and a second half, and each is often played twice. Many dances by Bach and Handel work this way.

Hear it: a minuet from Bach’s notebook for Anna Magdalena.

ABA: there and back

This is the easiest form to hear. A tune plays. Something different follows. Then the first tune returns. Teachers sometimes call it sandwich form.

“Twinkle, Twinkle, Little Star” is ABA. The first line and the last line are the same tune. The middle line, “Up above the world so high,” is B.

Hear it:

• “Dance of the Sugar Plum Fairy,” by Tchaikovsky
• Hungarian Dance No. 5, by Brahms, which is fast, then slow, then fast
• The minuet from Eine kleine Nachtmusik, by Mozart. Read the guide.

Rondo: the tune that keeps coming back

In a rondo, the main tune returns again and again. Between its visits, the composer goes somewhere new. The plan is A B A C A, and it can go on to D.

“Für Elise” by Beethoven is a rondo. The famous opening is A. It comes back twice after two different middle parts.

Hear it:

• “Für Elise,” by Beethoven. Read who was Elise?
• The last movement of Horn Concerto No. 4, by Mozart
• The last movement of Eine kleine Nachtmusik, by Mozart

Theme and variations: one tune in new clothes

The composer states a tune, called the theme. Then the tune comes back many times, and each time one thing has changed: the speed, the rhythm, the mood, or the instruments. A child can always find the old tune inside.

Hear it:

• Mozart’s 12 variations on the “Twinkle” tune. Read who wrote Twinkle, Twinkle, Little Star?
• The second movement of the “Surprise” Symphony, by Haydn. Read the guide.
• The Young Person’s Guide to the Orchestra, by Britten. Each variation shows off one instrument. Read the guide.
• “Simple Gifts” from Appalachian Spring, by Copland

Sonata form: the big one

The first movement of most symphonies and sonatas uses this plan. It has three parts.

1. Exposition. The composer sets out two tunes. The first is often bold, and the second is gentler.
2. Development. The tunes are broken up, mixed, and sent through new keys. This is the adventure.
3. Recapitulation. Both tunes come home, in order.

It is a big ABA, where B is made out of pieces of A.

Hear it: the first movement of Eine kleine Nachtmusik by Mozart, or the first movement of Beethoven’s Symphony No. 5. Read the Beethoven Symphony No. 5 guide.

How to hear form

Ask one question as the music plays: same or different?

• If a tune comes back, that is a repeat. Use the same letter.
• If the music changes, that is a contrast. Use a new letter.
• If the tune comes back with changes, that is a variation.

Games to play

• Letter cards. Write A, B, and C on three cards. Hold up the right card as the music changes. Start with Hungarian Dance No. 5.
• Shapes. Draw a circle for A and a square for B. Draw the piece as a row of shapes.
• Move it. March for A. Sway for B. Spin for C. Play a rondo and let the body show the form.
• Build a rondo. Clap a short pattern as A. One child makes up B, and all clap A again. The next child makes up C.
• Vary a tune. Sing “Twinkle” fast, slow, sad, jumpy, and in a whisper. Those are five variations.
• Find the form of a pop song. Verse and chorus are A and B.

Words to know

• Form: the plan of a piece
• Theme: the main tune
• Repeat: the same music again
• Contrast: music that is different
• Coda: an ending added after the plan is complete

Print and play

Write the letters for a piece on a listening journal page. For the larger kinds of piece, read symphony, concerto, and sonata explained and what is a movement? For a form built on a chase, read what is a fugue? For the rest of the basics, read music theory for parents.