B.D.
Too much sugar (even natural will cause hunger). Think beyond breakfast for food - my TEENAGERS generally have non breakfast items in the a.m. which can keep them going thru the day.
Some yummy suggestions we eat: Rice w/chick peas (we eat it cold, but you may want to heat it up in a pan). I make a HUGE batch on the weekend and the kids eat this combo like a savored treat.
Veggie pancakes (I use potato as the base and add shredded carrots, onions, green peppers, spinach etc.) Make on the weekend a large batch and put in toaster oven in the a.m. for a "hearty and healthy" breakfast. (mine add salsa, ketchup or hot sauce to the top).
Beans and rice (I made a large batch last night for dinner and it's gone in one sitting, but also a great alternative in the a.m.).
Not sure if you are vegan, but when I'm feeling "lazy" about the week ahead, I put together a quiche and throw everything leftover in it (so it's packed w/veggies) and the kids grab and go.
Skip the juice and switch to herb tea's (without sugar). I have a ton of fresh mint, sage and rosemary all year long, so I infuse with Organic black and green teas - the kids like the Mint the best. I buy juice on occassion - but we generally drink herb tea's and water (to stay away from the sugar).
Being a "former" vegatarian of 18 years, I really had to watch the natural sugars from fruit - I found over the years that veggies keep the kids a bit more on balance in the a.m.
Good luck - and have fun mixing up the breakfast routine (you'll love it really).