Atended or Attended: How To spell?
The word Atended is misspelled against Attended, which is past tense of "Attend"
Attended has double "tt" is mispronounced as "t"Remember double 'TT' in between the strings a & ended which should not be misspelled with single 'T'
Wrong Spelling:  a-t-ended  Correct Spelling:  a-tt-ended 
Explore spell check of Attended to spell without errors.