Cheverly has a very active home school group. Some of the members started a STEM program and they were written up in the gazette. I bet if you message their facebook page that they would put you in contact with the regular Homeschool Co-op group
http://www.gazette.net/article/20140227/NEWS/140229322/0/cheverly-home-schoolers-branch-out-with-stem-program&template=gazette
https://www.facebook.com/CheverlySTEMCenter?ref=stream