A child's buggy algorithm can be useful under conditions where it ...

[cmoore54]

A child's buggy algorithm can be useful under conditions where it
 
  a. leads occasionally to a correct answer
  b. is a part of a change schema
  c. helps a teacher identify the child's conceptual difficulties
  d. can be deduced from a problem typology

Question 2

Whereas experts rely more on ___?___ aspects of mathematics problems in solving
  them, many students tend to focus more on problems' ___?___ features
 
  a. semantic, surface
  b. verbal, imaginal
  c. procedural, declarative
  d. affective, cognitive

[kishoreddi]

Answer to Question 1

c

Answer to Question 2

a

[cmoore54]

Thanks for the timely response, appreciate it

[cdmart10]

Gracias!