I have created a free course on Memrise that concentrates on classroom language such as <em>please repeat, I don't know, how do you say..., what does ... mean, </em>and more. 

My main focus is on listening. Each level is divided into 2 sub-levels. One sub-level focuses on the English definition of the audio clip and the other one focuses on the Chinese characters. 

Here is the link to the Memrise course:

http://linbb.com/2b

Here is the link to the content of the course, phrases with alternative answers, and change logs: 

http://linbb.com/2a

If you have any suggestions in making this course better, please let me know. 

I hope this will help you study Chinese Mandarin. 

Good luck and have fun! (^_^)