I went skiing to Tignes-le-Lac. : )
The slopes are great, numbered and large, and there are enough ski lifts so you don’t wait years, to be carried up again.
With the “Killy Ski pass” you have some free activities, such as the swimming pool (at 30°C), the weights room, and free ice skate rental and access to the ice rink (though I do not recommend this last activity due to the extremely bad quality of the ice skate shoes).
Here, the pictures (click to make it bigger) :