ISBNs
| Component | Level 1 | Level 2 | Level 3 | Level 4 |
| Student’s Book, CD, Audio | 9780138150433 | 9780138150457 | 9780136064398 | 9780136064060 |
| Student’s Book Split A | 9780132442893 | 9780132442916 | 9780137006663 | – |
| Student’s Book Split B | 9780132442909 | 9780132442572 | 9780137006410 | – |
| Teachers Edition | 9780132305372 | 9780132305389 | 9780132305044 | 9780132305051 |
| Teachers Edition Split A | 9780136133469 | 9780136133483 | 9780136133513 | – |
| Teachers Edition Split B | 9780136133476 | 9780136133506 | 9780136133452 | – |
| Audio CD | 9780132305495 | 9780132305501 | 9780132305518 | 9780132305525 |
| Language Booster | 9780132305105 | 9780132305112 | 9780132305129 | 9780132305488 |
| Posters | 9780131580572 | 9780131580589 | 9780131580602 | 9780131580558 |
| Test Generator | 9780132305068 | 9780136151340 | 9780136151357 | 9780136151333 |
| DVD | 9780132305532 | 9780132305532 | 9780132305549 | 9780132305549 |
| Placement Test (for the course) | 9780132305556 | – | – | – |