There is an Ecole du Ski Francais hut on the main street about 60 seconds walk from Chalet Alys. In there you can find all the information you need on ski school, coaching, guiding etc.
You can also go online to the Portes du Soleil website to see more details.
Abondance has a ski school which teaches skiing on the Abondance slopes and goes further up the valley.
The ski slopes in Abondance are very good for beginnners because they are gentle, wide and never too busy to make them feel uncomfortable. Also people skiing in Abondance seem to be a bit more respectful of each other. Maybe this is because it is mostly families, or because the ski area has a kind of retro feel to it.