Welcome to Chennai. There are very few schools which deliver proper IB teaching in Chennai. I have compiled a short list of schools that may be of interest to you, you must take the effort to visit each school and evaluate for yourself -
1. International Village School - Expat & Indian teachers with foreign teaching license, Complete IB school located in Sholinganallur, this school was my favourite when I reviewed many schools in Chennai for my children. The fee charged and quality of teachers as well as infrastructure all met my expectations.
2. American International school - Expat teachers and Indian teaching assistants, part AP curriculum and IB in high school as an option. Too expensive for me and did not like the culture, but infrastructure is decent.
3. TIPS - All Indian teachers without foreign license, with very poor methodology of teaching IB. If you are looking for proper IB this may not work
4. Kids Central - IB head but Indian teachers without foreign license, they offer a mix of UK Cambridge and IB. Was too far for me and also the teachers quality is only average. For the fee charged I felt teaching quality can be better.
Good luck on your search.
There is one more school called Aksharbol on ECR, please visit that school as well. It did not meet my expectations.