Cambridge ESOL Exams       KET PET FCE CAE  
CEFR levels A1 A2 B1 B2 C1 C2
ALTE Breakthrough Level 1 Level 2 Level 3 Level 4 Level 5
TOEFL iBT® (total score)     57 - 86 87 - 109 110 - 120  
 
Foucs on Grammar Interactive              
AZARi              
Focus on Grammar              
Azar-Hagen Grammar Series              
Real Grammar                
Grammar Practice              
Grammar Express              
Center Stage              
Longman Advanced
Learners' Grammar
             
An Introduction to English Grammar              
Longman Student Grammar of Spoken & Written English              
Longman Grammar of Spoken & Written English