Betering or Bettering: How To spell?
The word Betering is misspelled against Bettering, which is present continuous of "Better"
Bettering has double "tt" is mispronounced as "t"Remember double 'TT' in between the strings be & ering which should not be misspelled with single 'T'
Wrong Spelling:  be-t-ering  Correct Spelling:  be-tt-ering 
Find more wrongly spelled words of Bettering to spell it well.