Mine DS was the opposite read long before writing.
He knew the letters early maybe at 1. But writing came after 3.
I had to push the writing.
We sat there every day for one summer practicing.
I had to get a dry erase board and practice saying stuff say for letter K (Down, kick in and then kick out), or H (Down Down and across) B (down around around). E (down Top Middle Bottom). I had to do this over and over before he could write them.