Hi,
Yes, booking ski school is easy enough - just go to the office (next to the beginner slopes at the top of the green steps) and book. They speak good English at the desk. Make sure you are there before the start of the lesson you want. Morning groups start at 10 on the Monday and Afternoon groups at 12. If you book at the office you should be able to choose which you want. If the kids are already booked in with Panorama then they will probably be in the afternoons as you said.
Getting ski hire in the shop should be no problem either, but if you can get there early before the rush they will have more tine to find you the right skis.
There is some information on the hire shops with typical prices on our
new ski shops page.
Hope this helps,
Ian