Dyslexia checklists:

How to Tell if a Young Child may be At-Risk of Dyslexia (Suitable for Kindergarten, Reception and Yr 1 students)

How to Tell if a Primary School Student may have Dyslexia

How to Tell if a Middle or Secondary School Student may have Dyslexia

I think I might be Dyslexic - Adult Dyslexia Checklist. (The British Dyslexia Association)