hi every body, 
I have a game I use with my students...
 
For example if you want students "master" countable and uncountable  in unit "food and drink".
the procedures: 
   1-you group a reasonable number of students in one long line( one behind the other)
  2- the teacher stands next to the raw and when the teacher says a name of any food or drink students in all have to vascilate bewteen two lines right or left. 
       the right line =countable. 
       the middle one=(the initial state before the teacher says a word)
        the  left line= uncountable. 
if the teacher says apple
      students move to the right 
if the teacher says tea.
       student move to the left
The student that hesitated or moved to the wrong line is elimenated till there is one winner .
    
good luck