First time Skiiing lessons in Hokkaido

Hi all, we are intending to have our first experience on skiing at hokkaido next week - with perhaps 2-3 hours of personal coaching. Can anyone advice if we need to make prior reservation with a ski resort school? It's just gonna be a day trip. Which is recommended for skiing- Mt Teine or Bankei? -preferably somewhere near Sapporo.

No big different.
http://www.sapporo-teine.com/snow/school/regular/
http://www.bankei.co.jp/school/lesson.html
Need booking until 5pm of last day both.

No need private[プライベート/個人(kojin :personal)] lesson[レッスン].
Group[グループ] lesson cheaper enough.(4h better for 1st timer)
大人(otona) :adult

However, playing ski/snow boad is no so easy than u think.
Easiest item is Snow-scoot/-moto/-bike like this.
http://youtu.be/8frNSh9SG2M
No need special lesson for playing body barances.
But Teine and Bankei both are no rent should go Fu's(Fuzzu) snow area.
http://www.shsf.jp/fujino-yagai/index_w.html.