Hello Hema,

There are many coaching centres which conduct classes for the preparation of civil service exams.

Some of the top coaching institutes for CSE are -

* Vajiram and Ravi

* Rau's IAS Study Circle

* Sathya IAS Academy, Chennai

* Brain Tree India, Hyderabad

* Chanakya IAS academy, New Delhi

* Khan study circle, New Delhi

These coaching centres would help you in preparing good but I will strongly recommend you for the self study to get prepared strategically for CSE.

Good luck,

Hope it helps :)