Here's an article I wrote in the summer of 2016 about how 'practicing on purpose' adds value to the quality of your training. The article was published last Autumn in the Annual Publication of the National Schools Snowsport Association (NSSA), 'Schools Snowsports'. The link below takes you to the whole magazine, my article is on page 12.
There are some interesting articles in the magazine; one from Pete Gilespie Head of Snowsports at the Snow Centre, Hemel Hempstead; another about a Schools ski racing in Wales written by Robin Kellen the Chief Executive of Snowsport Wales, and articles describing the system of coach and instructor education in the UK. There's alot of interesting stuff in there.
Also here's the link for the NSSA, a 'not for profit' organisation which is doing some great things for schools snowpsorts.