Here are some articles on ear training for beginning students that incorporate the use of BigEars.
Ear training is the most important part of a musicians development. The good news is that in just 10 minutes per day you can make considerable progress. But you must drill on your ear training exercises every day for a while until you master them. Start simple with intervals and triads, then progress into inverted chords and eventually into extended chords and altered harmony.
Written by Catherine Schmidt-Jones and Russell Jones. An excellent introduction to ear training with suggested exercises and links to music theory lessons.
The free jazz handbook is invaluable. Scroll down to the interval chart and download it. It demonstrates use of familiar melodies as guide to indentifying intervals.
A Jazz Improvisation Primer is recommended reading for any beginning jazz student.