| 978-607-493-332-1 | Teacher's Guide Crossover Plus 1 | U.D. Publishing | Angélica Sánchez de la Barquera
Kim Milne Thompson
| 2012 |
| 978-607-493-412-0 | Crossover Intro Workbook | U.D. Publishing | Kim Milne Thompson
| 2013 |
| 978-607-493-415-1 | Crossover Intro Teacher's Guide | U.D. Publishing | Kim Milne Thompson
Mark Eccles
| 2013 |
| 978-607-493-416-8 | Crossover Intro Teacher's Guide | U.D. Publishing | Kim Milne Thompson
Mark Eccles
| 2013 |
| 978-607-493-421-2 | Crossover Intro Workbook | U.D. Publishing | Kim Milne Thompson
| 2013 |
| 978-607-493-424-3 | Teacher´s Guide Crossover Plus 1 | U.D. Publishing | Angélica Sánchez de la Barquera
Kim Milne Thompson
| 2013 |
| 978-607-493-483-0 | Crossover Intro Workbook | U.D. Publishing | Kim Milne Thompson
| 2014 |
| 978-607-493-489-2 | Crossover Intro Teacher's Book | U.D. Publishing | Kim Milne Thompson
Mark Eccles
| 2014 |
| 978-607-493-520-2 | Crossover Plus 1 Teacher's Book | U.D. Publishing | Angélica Sánchez de la Barquera
Kim Milne Thompson
| 2014 |
| 978-607-493-583-7 | Crossover Intro Workbook | U.D. Publishing | Kim Milne Thompson
| 2014 |
| 978-607-493-587-5 | Crossover Intro Teacher's Book | U.D. Publishing | Kim Milne Thompson
Mark Eccles
| 2014 |
| 978-607-493-588-2 | Crossover Plus 1 Teacher's Book | U.D. Publishing | Angélica Sánchez de la Barquera
Kim Milne Thompson
| 2014 |
| 978-607-493-607-0 | Prep 4 Life Student's Book 1 | U.D. Publishing | Kim Milne Thompson
| 2014 |
| 978-607-493-609-4 | Prep For Life 1 Teacher's Guide | U.D. Publishing | Kim Milne Thompson
| 2014 |
| 978-607-493-624-7 | Prep For Life Teacher's Guide 2 | U.D. Publishing | Kim Milne Thompson
| 2014 |
| 978-607-493-711-4 | I-World B1 Teacher's Guide | U.D. Publishing | Kim Milne Thompson
| 2015 |
| 978-607-493-734-3 | I-World B1+ Teacher's Guide | U.D. Publishing | Kim Milne Thompson
| 2015 |