You will recall the pattern of tones and semitones used to create the C, F and G major scales. Memorizing this pattern will allow you to build a major scale on any of the twelve notes used in music.
The semitones are always found between the 3rd and 4th, and 7th and 8th degrees of the scale. All the other notes are a tone apart. A scale based on this pattern will be named by the note it starts on, as seen in the following example.
Now that you know how major scales are constructed, try writing major scales built on the notes A, B, F#, Eb, Db and Gb on the following staffs. Some will contain sharps, while others will contain flats. Remember that the scale is named from its starting note and all you have to do is follow the pattern of tones and semitones.