I would personally book ski schools direct - there are a few English
speaking schools in Val - see this link for the best according to
Finlay Ski -
http://www.finlayski.com/valdisere/facts_school.htm. We
have used snowrental for cheap ski hire
www.snowrental.com but I read
about this company who do a 2 for 1 deal and you can choose the skis
http://ski-republic.com.
We are going to Les Menuires next week - can't wait!