High school for student with dyslexia and slow processing?

I do not have a student there so cannot speak to your specific question, however I do have a LD student and believe it is really important that when they are entering any private school you do your due diligence in investigating any support system a school has in place for LD students, because their HS academic success is so very important. I would recommend that you contact their learning specialist directly and have a discussion about what programs they have in place to help your student, and compare them to other schools to which you are also applying. The decisions ARE hard and it's best to be as educated as possible. Good luck!