Month: March 2019 Northern VA Regional Science and Engineering Fair Winners! Posted on March 19, 2019 at 3:51 pm. Congratulations to all students who participated in the Northern Virginia Regional Science and Engineering Fair. And a special congrats to our Thomas Jefferson students on their award-winning projects! Good job Yellow Jacket scientists! Summer School Registration Closes June 7th! Posted on March 13, 2019 at 2:36 pm.