Hi
DD6 was in first grade (skipped K) last year and her first term reading level was M and she advanced to Q at the end of year.
If your kid is well rounded, then (if you wanted it all well) you can advocate for grade skip.
regarding picture books your kid bringing home may be partly his interest, DD brings some books which are very basic like books for babies with animals and fur and no letters in book!!!from school and library very frequently. DD wants some books she can read in minutes and get over with it.. maybe your DS is like that
