| Wow | 
		— | 
		Correct approach,
no errors, went beyond requirements for solution, unusually clever or
thoughtful approach. | 
	
	
		| Good | 
		— | 
		Correct approach,
no errors. | 
	
	
		| Fair | 
		— | 
		Correct approach,
minor errors OR immediately recognized errors and corrected on the fly. | 
	
	
		| Poor | 
		— | 
		Correct approach,
major errors OR recognized errors with assistance, struggled to correct but
managed. | 
	
	
		| Ouch | 
		— | 
		Incorrect
approach, major errors, had trouble recognizing errors even with assistance,
struggled to correct. | 
	
  
    | Wow | 
    — | 
    Lively exchange, new insights brought up, new questions raised, implications taken to a new level. Prof doesn't have to say anything. | 
  
  
    | Good | 
    — | 
    Fairly lively exchange, conventional insights brought up, typical questions raised, standard implications discussed. Prof needs to bring up a minor point or two. | 
  
  
    | Fair | 
    — | 
    Some questions asked or some insights mentioned, minor discussion of implications. Prof has to get discussion started. | 
  
  
    | Poor | 
    — | 
    One or two minor question asked. Prof leads but class doesn't follow. | 
  
  
    | Ouch | 
    — | 
    No questions asked, no discussion. Prof wonders when the next school break is. | 
  
	
		| Wow | 
		— | 
		Spoke clearly and distinctly, didn't struggle for explanation, easy to understand, had and used valuable additional visual or presentation aids,  answered questions facilely. | 
	
	
		| Good | 
		— | 
		Spoke clearly and distinctly, didn't struggle for explanation, relatively easy to understand. | 
	
	
		| Fair | 
		— | 
		Not always clear or distinct in speech, minor struggles for explanation, a little difficult to follow, struggled with questions. | 
	
	
		| Poor | 
		— | 
		Hard to hear or understand, major struggles to explain, difficult to follow,  struggled with questions. | 
	
	
		| Ouch | 
		— | 
		Hard to hear or understand, incoherent explanation, confusing, totally ineffective with questions. |