We came across this great tool created by www.i-courses.org and we wanted to share it with you!!!

Transitional words are so important when answering a speaking or writing question.  They give the reader / evaluator a very clear understanding of your opinion and what you are trying to say.  Transitional words function like directions.  You are providing the reader with an organized roadmap.

http://i-courses.org/docs/TOEFL%20iBT%20Transitional%20Words.pdf