The Elements of Music
Monophonic - One layer of sound
Homophonic - Melody and chordal accompaniment
Polyphonic - Two or more melodies, equally as important, played together.
Music notation: naming notes
Notes of the Treble Clef
Notes of the Bass Clef
Rhythm, note lengths and time signatures
Musical fruits
Tonality : Major and Minor
To revise what the difference between major and minor, watch this video:
The Instruments of the Orchestra
Revise the instruments of the orchestra by watching these videos:
Here is a layout of an orchestra, and the different instruments in each section: