For NA1, we will be using New English File (Upper-intermediate) by Oxenden and Latham-Koenig. It's published by Oxford University Press (OUP). We need the Student's Book and the Workbook. Importantly, the Workbook should include the Answer Key.
For NB2, you need Face2face Pre-intermediate by Redston, Clark, Young and Coward. It's published by Cambrdige University Press (CUP). You need the Student's Book and the Workbook. Again, it's very important that the Workbook includes the Answer Key.