| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| English Explorer 2 Workbook with CD | 978-83-7409-699-7 (83-7409-699-3) | 2013 |
| English Explorer 3 Podrecznik z plyta CD | 978-83-267-0269-3 (83-267-0269-2) | 2011 |
| English Explorer 4 Workbook with CD | 978-83-7409-864-9 (83-7409-864-3) | 2011 |