The classroom music teacher will have to remember the first experiences which probably involved a piano which has become less popular than formerly. If the students are not familiar with keyboards they will have difficulty understanding the notes of a major scale which are not evenly spaced due to the fact that most steps are a full note but two are half steps. Therefore project one should be for the student to obtain a keyboard instrument and play a scale on the white keys only, starting with middle C.
When the student has done this he or she should be instructed to draw and label the notes on a keyboard. The concept of sharps and flats should be explained. The student should then be shown the lines for the treble clef and how the notes on the score correspond to those on the keyboard. Then the student can be shown how to play "Jingle Bells" or some other simple tune.