56 books • 9 series
New Gateway to English for Senior High Schools Teacher's Guide 1 (New Gateway to English)
New Gateway to English for Senior High Schools Students' Book 3 (New Gateway to English)
New Gateway to English for Senior High Schools Teacher's Guide 3 (New Gateway to English)
New Gateway to English for Senior High Schools Students' Book 1 (New Gateway to English)
New Gateway to English for Senior High Schools Students' Book 2 (New Gateway to English)
Nigeria Junior English Project for Secondary Schools Students' Book 2 (Junior English Project for Nigeria)
Nigeria Junior English Project for Secondary Schools Students' Book 3 (Junior English Project for Nigeria)
Nigeria Junior English Project for Secondary Schools Students' Book 1 (Junior English Project for Nigeria)