Only then , according to their abilities , they can continue in learning skiing on longer skis and in a more difficult terrain ( steeper or bumpy slope ) .
The pupils need to practise all the necessary exercises on shorties during the first days of learning skiing .
Only then , according to pupils ' abilities , pupils can continue in learning skiing on longer skis and in a more difficult terrain ( steeper or bumpy slope ) .
The pupils need to practise all the necessary exercises on shorties during the first days of learning skiing .