Connecticut Gen. Stat. Sec. 31-48d specifically prohibits electronic monitoring of employees without notice (with some exceptions). Under the statute, municipalities and schools must post notices that clearly communicate to all those who enter the building that there is CCTV monitoring in progress. This is a strong defense against any argument about the expectation of privacy.
Here is a virtual tour of Plainfield Memorial School for incoming 4th graders. You can see the school, meet your teachers and meet other friendly faces!