How do you know that this approach works?

At XP we follow the same methods as a number of schools in the USA have been doing for over twenty years. High Tech High and Expeditionary Learning schools have been incredibly successful, with the evidence showing that they outperform their district equivalent schools across many measures.

http://elschools.org/our-results/academic-achievement

http://www.hightechhigh.org/about/results.php

As teachers, we have experienced this for ourselves, and have established sustainable relationships with HTH and EL that allows us to draw upon their knowledge and experience.

Our aim, like HTH and EL is that 100% of our students are able to go to university.