Since CVE is a magnet school, it is difficult to get into unless you apply for kindergarten. They do have a waiting list for other grades though. I think there were 1 or 2 students who left my child's class over the summer so they did fill those spots for first grade from the waiting list. Check out the BCPS website for info about the waiting lists:
http://www.bcps.org/offices/omp/waitlist_faq.html
The curriculum is the same as other BCPS for the most part although each school implements everything a little differently. Each classroom has Smart Boards that are part of most of their reading and math lessons. They learn and use other technology that other BCPS don't use at that level such as Skype, Voice Thread, personalized reading and math programs, etc. I feel like my child is getting a more individualized reading and math program because of them although he still follows the same reading and math curriculum as the other schools in the county.