This is taken directly from https://www.intensiveinteraction.org/ as written by Dr Dave Hewett.
Dave has been into school to deliver training on Intensive Interaction and Katy Wadsworth has completed a course with him to achieve the title of Intensive Interaction coordinator. She uses this approach in school to great effect and has even visited Romania to work with orphans through a charity and used Intensive Interaction in this setting too. She has then in turn trained Dee French who now also holds a certificate in the technique. There are books and DVDs in school on the approach that can be borrowed and it is modelled daily by all staff, it can have astonishing results and is still one of the most favoured tools to hand for anyone and everyone. The best thing about it is that it can be done literally anywhere and the only tool you need, is yourself!