BVM global inside Bollineni hillside would be the nearest to you. Also babaji vidyashram sholinganallur, velammal sholinganallur/medavakkam are few other schools nearby
Like Dadycool says you have Babaji Vidhyashram, BVM Global, Velammal. Also visit Barathi Vidyalaya, PSBB, Ramana Vidyalaya.
Take the pains to visit and evaluate every school carefully before you decide. I had Babaji Vidhyashram as my no.1 choice & PSBB as my no.2 when I researched some time back.
I have posted a detailed review of several schools in another thread earlier, if you search you will find it. Otherwise let me know I will repost.