http://www.slideshare.net/jaykay3333/basic-english-grammar-book-1-15741525
http://www.slideshare.net/xaky/basic-english-grammar-book-2-kids?related=1
http://www.slideshare.net/xaky/basic-english-grammar-book-2-kids?related=1
http://www.slideshare.net/baasandorjarhangai/basic-english-grammar-book-1-12890136?related=2