In the old Dean's Award syllabus you used to have to sing a certain degree of the scale from 2 to 6. Although you no longer have to do so, you can use this page for warm-ups and interval training.
You will hear a key chord, 3 clicks and a rest, then an 8 note scale, 3 clicks and a rest and a 6 note scale.
Sing the rising octave scale with the midi file to a syllable such as 'ta', 'da, or 'lah' but try singing the six notes to "1, 2, 3, 4, 5, 6.