I am a new ESL teacher and have a student with the specific intention of taking the TOEFL and GMAT to pursue a Master's in Business in the US.

Question: What would be the best textbook and materials for him for this specific agenda? I have a solid business background myself, but am not yet familiar with the TOEFL and prep materials. I've found lots of prep materials listed, but I'm hoping to hear from someone with some first-hand experience in using particular materials. My thanks in advance!

PS If anyone has interest in teaching here in Brazil, drop me a line. The market is very good.