Dear friend,
Now, CBSE has made compulsory this exam for the teachers aspiring to teach in CBSE Schools.
CTET stands for Central Teacher Eligibility Test.
Upcoming CTET Exam will be commenced on 28 July 2013.
Some of the best books for the preparation of CTET Exam are:

CTET Central Teacher Eligibility Test 2011: Social Studies/Social Sciences Teacher For Class VI - VIII (Paper - II) 1st Edition (Paperback)
Author: Arihant Experts
Publisher: Arihant (2012)
Price: Rs. 239

CTET Central Teacher Eligibility Test Practice Workbook Science / Maths Paper - 2 (Class 6 - 8 Teacher) (Paperback)
Author: Disha Experts
Publisher: Disha Publication (2012)
Price: Rs. 114

CTET/STETs Exam Guide (Paper - 1) (Paperback)
Author: RPH Editorial Board
Publisher: Ramesh Publishing House (2012)
Price: Rs. 204

CTET Kendriya Shikshak Patrata Pariksha: Success Master Samajik Adhyan Shikshak ke liye Hal Prashan-Patra Ke Sath Paper - 2 (Class 6 - 8) (Hindi) (Paperback)
Author: Expert Compilations
Publisher: Arihant Publications (2012)
Price: Rs. 277