Best route to becoming a network manager?
So coming up to quite an important decision in my studies and I am looking for a few pointers. I have been working in a school as an ICT Technician now since 2009. When I started we ran a CC3 network and now run a vanilla Windows network compromising of XP & Server 2008 R2, moving over to Win 7 this summer. I am currently studying the MCTS and the following Comptia course: A+,N+,Server+,Security+
I have been thinking about doing a degree through the Open University but I am unsure whether this is the right thing to do, it could take up to 6 years to complete and I wonder how much credibility it will hold down the line when the stuff I learnt at the beginning is years outdated. Would I be better off looking into more IT courses such as the MCSE, CCNA etc? I hope to eventually take over as the network manager of the school I work in, although this is a long way off.
Also if anyone has any other pointers, tips or things I should start doing to further help me in my long term goal it is as always, greatly appreciated.