Important dates for Delhi area are mentioned.Dates for other test centers can be viewed below

https://www.ets.org/bin/getprogram.cgi?test=toefl

TOEFL preparation study material , videos and online practice test can be viewed below:

ETS offers a variety of practice materials to help you prepare for the TOEFL iBT® test and build your English skills. Materials include free sample questions, practice tests, interactive skill-building programs, and detailed tips and information for understanding more about the test.

1.TOEFL® Practice Online is the only official practice test that gives you the experience of taking the real TOEFL iBT test. You will be able to review and answer authentic test questions and get same-day scores and feedback on all four skills measured on the test - reading, listening, speaking and writing.

You can take the practice test at home, at school or wherever there is an Internet connection - 24 hours a day, 7 days a week. Each volume has a different set of questions, so you can practice a few times to prepare for success on the TOEFL iBT test.

2.The Official Guide to the TOEFL® Test, Fourth Edition:

This bestselling guide has three full-length tests plus hundreds of valuable tips. Available in eBook and paper book format, this is an authentic test preparation guide from ETS, developer of the TOEFL test. This guide provides a comprehensive all-in-one reference to the TOEFL test with skill-building tips to help you do your best.

3.Official TOEFL iBT® Tests with Audio: 

With five real past tests and all of the audio passages on disc, and available in eBook and paper book formats, this prep book gives you lots of TOEFL iBT test practice and is the perfect companion to The Official Guide to the TOEFL® Test. It also includes the TOEFL® Test Prep Planner to help you create an eight-week plan to prepare for the test. eBooks with CD-ROM content are delivered via electronic download at the time of purchase. No physical CD-ROM is mailed or delivered.

4.TOEFL® Online Prep Course:

This test-prep course is an online tutorial that helps prepare students for the TOEFL iBT test, by creating a personalized learning path with up to 80 hours of course content over a 6-month subscription. The course includes diagnostic tests, robust exercises, automated scoring, structured self-assessments and a grade book. Management tools allow institutions to create and manage instructor-led classes. 

Following skills are tested in this exam:

1.Reading 

2.Listening

3.Speaking

4.Writing

Given below are the list of study material that can be used by students for preparing for TOEFL exam:

1.TOEFL iBT® Interactive Sampler :

Click here for more,

2.Sample question can be viewed from link given below:

Click here for more,

3.TOEFL value packs can be viewed from link below:

Click here for more,

TOEFL® Tips

• Use the English Language Every Day
• Set aside time each day to communicate only in English. Listen, read, speak and write in English every chance you get.

Write

Send emails, make notes for yourself and write down daily reminders, using new words and common expressions. This helps with sentence structure and vocabulary.

Listen

Listen to music, online broadcasts, radio, television and movies in English. The more you listen, the more you will understand vocabulary and expressions. Music helps you acquire the rhythm and stress patterns of spoken English. Listen closely to the words.

Read

Reading is the best way to improve your vocabulary. English-language reading materials — newspapers, magazines, books and websites — are always available. See Lexile® Measures for additional ways to improve your reading skills.

Speaking Tip

Concentrate on speaking loudly and clearly with good pronunciation and intonation. Try to speak in thought groups to have good flow to your speaking. Pause after prepositional phrases and related thought groups. Add emotion and feeling to what you are saying. Practice the same speech in your own language and then try to match the same gestures and feelings when you use English.

Keep a Journal

Write down things you are doing to prepare for college and other events in your daily life. This is a great way to organize your thoughts and practice writing in English. You can track your own progress. Read it to yourself and read it out loud.

Practice on a QWERTY Keyboard

A standard English language (QWERTY) computer keyboard is used for the test. Practice typing on a QWERTY keyboard to become familiar with the keys and layout.

Tips for Success on Test Day :

• Dress comfortably for any room temperature.
• Eat a good breakfast.
• Arrive at the test center at least 30 minutes early.
• Follow directions carefully to avoid wasting time.
• Do not panic. Concentrate on the task in front of you. Do not think about questions you have already answered.
• Do not spend too much time on one question.
• Do not leave questions blank. If you are not sure of the answer, make the best possible choice.
• Pace yourself to answer every question and avoid rushing at the end.

ETS has introduced TOEFL PBT which is a paper based test.This has been done to provide equal opportunity to all the students.The centers for the paper based test have been set in places with electrical instability, political disturbance etc. 

The revised form of the TOEFL PBT will start from October 2017 which will be more in line with TOEFL iBT.The major difference between the two tests will be that there will no testing of the speaking skills due to the technological requirements.

The scores will be evaluated in a such a way that it remains a level playing field for all the test takers globally.

For information on Test Centres dates along with dates click here