Yes, Monica, it does need to be clearer.
How long has the boy been in the reception class? One term? A year? Is he usually a quick learner or a slower one?
What is his disability? There are many many kinds of disablement.
What do you mean by "punishment"? Extra practice? Standing in the naughty corner? The cane? Exclusion? Jail?
What do you expect as "support"? More one-to-one tuition? Extra lessons? More practice? Homework? Liaison with parents? Referral to a specialist?
What do his parents feel? Have they taken this up with the teacher, or with the head-teacher? Unless you have the care of the boy, they are the ones with the responsibility for that.