Does this person have an LSP? If so, perhaps regular discussions with the LSP would help to reinforce the learning, or simply, set up regular meeting with yourself, your mentor/main tutor, the LSP and the student? These could be extremely informal, maybe 10 minutes, so that the student is comfortable. I know that it is very frustrating to deal with someone in that condition, I've had a little experience, family stuff which can't be walked away from.
Have you considered implementing performance assessments. If students are preparing to show that they understand a concept they are less likely to misbehave. Making it a fun activity should capture their attention even longer. Also, assigning group projects with roles creates a cooperative environment. Keeping students moving and physically engaged is key in my opinion.
thats a fantastic suggestion many thanks x
I personally believe family treatments that combine support and education will be more helpful cope and reduce the odds of symptoms returning.