The word Mistaching is misspelled against Misteaching, which is present continuous of "Misteach"
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Misteaching has vowels 'ea' together mispronounced as 'a'
Word contains consecutive vowels 'EA' in between alphabets mist & ching is misspelled as 'A'
Wrong Spelling:  mist-a-ching 
Correct Spelling:  mist-ea-ching 
Find more wrongly spelled words of Misteaching to spell it well.