How to get staccato with only skype lessons and by reading the book.

16 years old student Edward from New York plays R. Kreutzer Etude no.4 using my method The Shonert Technique. He did not play any staccato before he bought the book 'How to master firm staccato up and down in 3 lessons" and took couple of my skype lessons
https://www.youtube.com/watch?v=O2T5NytDJn0