| 978-607-493-352-9 | Crossover Higher 1 Teacher's Guide | U.D. Publishing | Stephen Dudley
| 2013 |
| 978-607-493-435-9 | Crossover Higher 1 Teacher's Guide | U.D. Publishing | Stephen Dudley
| 2013 |
| 978-607-493-481-6 | Crossover Higher 2 Teacher's Guide | U.D. Publishing | Stephen Dudley
| 2013 |
| 978-607-493-449-6 | Crossover Higher 2 Teacher's Guide | U.D. Publishing | Stephen Dudley
| 2013 |
| 978-607-493-457-1 | Crossover Higher 3 Teacher's Guide | U.D. Publishing | Ian Gardner
Stephen Dudley
| 2013 |
| 978-607-493-458-8 | Crossover Higher 3 Teacher's Guide | U.D. Publishing | Ian Gardner
Stephen Dudley
| 2013 |
| 978-607-493-459-5 | Crossover Higher 3 Teacher's Guide | U.D. Publishing | Ian Gardner
Stephen Dudley
| 2013 |
| 978-607-493-519-6 | Crossover Higher 1 Teacher's Guide | U.D. Publishing | Stephen Dudley
| 2014 |
| 978-607-493-573-8 | Crossover Higher 1 Teacher's Guide | U.D. Publishing | Stephen Dudley
| 2014 |
| 978-607-493-574-5 | Crossover Higher 2 Teacher's Guide | U.D. Publishing | Stephen Dudley
| 2014 |
| 978-607-493-620-9 | Crossover Higher 3 Teacher's Guide | U.D. Publishing | Ian Gardner
Stephen Dudley
| 2014 |
| 978-607-493-621-6 | Crossover Higher 3 Teacher's Guide | U.D. Publishing | Ian Gardner
Stephen Dudley
| 2014 |
| 978-607-493-630-8 | Crossover Higher 2 Teacher's Guide | U.D. Publishing | Stephen Dudley
| 2014 |
| 978-607-493-801-2 | The Wright Brothers. Strange Case of Dr Jekyll Mr Hyde | U.D. Publishing | Stephen Dudley
| 2016 |