Learning the notes on a music staff requires the simple chore of memorizing the names for each corresponding line and space. A student of music develops this skill over time by working on music theory exercises, sight reading or as in the case of this course using quizzes to strengthen your skills.

Below you see a treble clef sign and how the notes are arranged for each line and space.
When notes are played that extend outside the range of the notes found on the staff, “ledger lines” are used to represent these pitches. Below is an example of some ledger lines.
Obviously when more and more ledger lines are used, reading music becomes very difficult. To alleviate this problem, other clefs were devised to make reading the notes that are out of the treble clef’s range easier.  The most common clef used for this purpose is the Bass Clef.  You can see from comparing the diagram below, that the note locations on the bass clef are different from the treble clef.
Ledger lines are also used in the bass clef as seen below.
If you are a beginner, starting in this course you will only be working with the treble clef, so those are the only notes and positions you will need to memorize. If you are interested in working with some of the other clefs, you can find information on them below:
Soprano Clef
Mezzo-Soprano Clef
Alto Clef
Tenor Clef
Baritone Clef