Quoting C'est La Vie♡:" My son is 4 years old. He goes to JK full day. I had in class observation and a small meeting with the ... [snip!] ... letters and she thinks it's a big issue.... Idk what to think about it. I didn't even know they had that kind of thing......"
I'd see if you can learn more about it. Is it like a special extra thing, or is it in place of the school?
Most of the time I think that smaller groupings like that are good. They can really help kids. However, that isn't always the case. Back in the day when I was in school, the made the left handed people sit separately during the writing parts to work with someone else. That sucked and there was really no reason for it. So it can do both ways.