Here is the link to the Baltimore County School Boundaries site. http://www.bcps.org/apps/Boundaries/ Just enter the address and it will tell you which Elementary, Middle and High School that address goes to. If you are ready to move, make sure you are represented by your own Realtor. In most cases it cost you nothing, and you will have someone looking out for your best interests. Rosedale is one of the areas I work, and I would be happy to assist you, just give me a call!
You can also call Baltimore County Public Schools to make sure!
Keller Williams Excellence Realty