I'm looking for advice as my son (7) is getting further behind his peers at school. He is under SEN team and is getting extra help. His teachers say that he's making progress and would only be concerned about him if he wasn't making any progress. At the beginning of year 2 he was assessed as being 1 - 1.5 years behind. Despite all the extra help he's getting his end of year report shows he is still working at reception level. So he will be going into year 3 two years behind, i.e. the gap is widening.
Background
He's my middle child and winterborn. I noticed he was different to other children from about 18 months old. He didn't listen, struggles to pay attention and does his own thing. They picked this up as well when he started school. He has attention targets set at school. He also struggled socially and he attends THRIVE sessions at school. Has now got a small circle of friends but still attends THRIVE sessions. ADHD ruled out by NHS assessment based on Connors questionnaire results from school (we submitted other evidence including private Qb test result but that was completely ignored). He's had some private SLT this year and his school have worked with his SLT's recommendations and are doing exercises with him to help him with this. His SLT needs are probably mild- moderate. He's had 1:1 phonics intervention sessions as failed phonics test in year 1 (score 6). Very narrowly failed year 1 phonics test again this year (score 31). He goes to a school book club, did a couple of terms of afterschool club "being an author" . We also pay for him to go to group tuition sessions twice a week.
I'm really looking for advice as to what do I do now? His school have not made any suggestions as to what might be the root cause of my son's issues. Should I do nothing and hope he will catch up? Should I look into other avenues e.g. dyslexia assessment/ Educational psychologist assessment/private ADHD assessment? Does anyone have any advice/been in a similar position?