Quizing or Quizzing: How To spell?

The word Quizing is misspelled against Quizzing, which is present continuous of "Quiz"

Quizzing has double "zz" is mispronounced as "z"
Remember double 'ZZ' in between the strings qui & ing which should not be misspelled with single 'Z'
Wrong Spelling: qui-z-ing
Correct Spelling: qui-zz-ing
Check more misspelled words of Quizzing to spell it correct.