There are loads of great books about, some of my favourites include:
Gerngross, G. Puchta, H. Thornbury, S. 2006 Teaching grammar Creatively Helbling Languages
Larson-Freeman, D. 2003 Teaching Language: From Grammar to Grammaring Heinle Cengage
Scrivener, J. 2010 Teaching English Grammar Macmillan.
Thornbury, S. 1999 How to teach Grammar Pearson.
Thornbury, S. 2001 Uncovering grammar Macmillan.
Thornbury, S. 2006 Grammar Oxford.