Re: Could a child fail a grading?
Just my 2 cents.
Our sensei only recommends that people test (Dan or Kyu) when they are ready to test. Using this philosophy it is extremely rare for anyone to fail, as they wouldn't be testing unless they are ready. In our dojo putting in the number of days of practice is a necessary but not sufficient criteria to test. Furthermore we don't have colored belts for kids. I have a daughter who started at 10.5 years of age. She just turned 14 and about to test for 3rd kyu. She understands this and has never had a problem with this, in fact I think she is proud to be treated just like the adults.