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Here are few good coaching institutes:
1. TIME - seems to have the most stable setup of teachers over the years, has the best material without doubt, and their test series is pretty decent.
2. IMS - Had the best material but kept on beating itself, the material became so difficult, it surpassed the required level. Same with the test series. IMS Lucknow faculty has been undergoing cycles of good and bad, lacks stability.
3. Career Launcher - Change of franchisee, change of locations, completely unstable. Also, poor material and poorer test series.
4. Team Satyam - Big balloon of gas.
5. PT, AMS - I don't know how do they remain in business.

Applicants appearing for their class XII final board examinations from any of the following boards:
Andhra Pradesh State Board, Telangana State Board, Tamil Nadu State Board and Kerala State Board.
-Minimum aggregate score of 80% in Physics, Chemistry and Mathematics in class XII final board results
-Valid score for JEE, any State-Government conducted engineering entrance test, SAT or ACT
B. Applicants from all other Indian boards recognized by the Association of Indian Universities (AIU)
-Minimum aggregate score of 70% in Physics, Chemistry and Mathematics in class XII
-Valid score for JEE, any State-Government conducted engineering entrance test, SAT or ACT
C. International Baccalaureate (IB) students are required to have studied Physics, Chemistry and Mathematics at the Class 12 level and have a valid score for JEE, any State-Government conducted engineering entrance test, SAT or ACT.
D. Cambridge/IGCSE board students are required to have 3 A-levels, studied Physics, Chemistry and Mathematics at the Class 12 level and have a valid score for JEE, any State-Government conducted engineering entrance test, SAT or ACT.

There are some comman books that you have to finish.
History- Spectrum modern history And for better understanding grover and belhekar is good in marathi.
Bipinchandra indias struggle for independance(This book is bulky and for pre 2016 time is less) This is also available in marathi.
Indian Polity-Laxmikant is compulsory and for parliamentary bills you can refer PRS india.DD basu is available in marathi.
Economics-questions were not in depth you can read Ramesh singh or sanjeev varma but not both are required.Most of the time Questions were asked from current affairs.Deepsthambh is good for conceptual cleariry in marathi .
Geogrophy-G.C.leong is good and short book, orien black swan atlas is enough as well ncert 6 to 12.
Science-Most of the question related to current affairs like LIFI, PROJECT LOON
so make your current affairs strong as much as you can and read NCERT from 7 to 10.
Environment- Shankar IAS is best for this if you cover this book along with current affairs so it will helpful for you to tackle this topic question.
Art and culture-Nitin singhania's book on art and culture is best and comprehensive book as well CCRT website is useful.
Current affairs-daily reading the hindu otherwise indian express is sufficient and VISION IAS monthly magzine is best to cover all topics because they give subject wise affairs.
NCERT are fundamental books they are very usefull for building up your concept so you have to read geography, polity,history,Science and economy books respectively.