Learning difficulties are generally expressed as a ratio to average intelligence on a cognitive test such as the Wechsler Intelligence Scale for Children (WISC-IV)
Categories may fall into:
Moderate Learning Difficulties (MLD) - IQ: 50-70
Severe Learning Difficulties (SLD) - IQ: 20-49
Profound Learning Difficulties (PLD) - IQ: less than 20
Children with MLD have a developmental delay across all areas of the school curriculum which can be over 3 years compared to chronological age – so need a high level of support. That would indicate that mainstream private schools would not consider MLD cases albeit perversely legislation mandates that State mainstream schools must take MLD and SLD cases.
Children with SLD can be the equivalent of much younger children and therefore in the private sector need Specialist SEN schools
Children with PLD definitely need to be in private specialist SEN schools with a very high degree of learning support
Specific Learning Difficulty ( SpLD ) covers dyslexia, dyspraxia, dysgraphia and dysclcaculia, but for classication purposes on what schools support we list them all under DYS.