1. Main Course:
New English File (3rd edition) (Oxford publishing)
Intermediate-Upper-intermediate
2. Listening- Speaking:
Q Skills Listening and Speaking 3-4 (2nd edition)(Oxford publishing)
3. Reading-Writing:
Q Skills Reading and Writing 3-4 (2nd edition) (Oxford publishing)
4. Grammar:
A Practical English Grammar Exercise 1-2 (Oxford publishing)