Hi OP I’m one of the previous MONA posters, sorry about that. Dcum is a little funny in that it’s anonymous, but if you want to share a dummy email for a way to contact you I’d be happy to reach out, I’m going through the process and have toured many north Arlington preschools recently and would be happy to share my notes.
CIS seemed warm, it’s located in a small home that has been turned into a preschool which is different but felt homey so I liked that aspect. It’s more affordable than some. They seemed to value play based learning, following the child’s lead, and are not “academic.” Which are pros to me but that’s personal preference. They operate on a rolling admissions and serve children 2 and up.
CCCC seems like an incredibly thoughtful program, also small, emphasis on child led and outdoor play. Coop so that’s a negative for some but it’s geared towards working parents and doable based on the parents I spoke to. The mixed age 3-5 classroom is a big open space which I really liked. It seemed like a special place. My friend recently visited and was said their list was full for 2.5/young 3 year old class but she could get on the list for 2021 in case something opened up.
Another to consider if you like the feel of the above two is Little Beginnings also in clarendon. I heard recently on MONA they might have some openings right now for 2 year olds. Worth a call. There has been some talk on here of issues with turnover, but generally I think people like the school and it seemed similar to the above programs when I visited - emphasis on play, outdoor time, social emotional learning.