Pestalozianism or Pestalozzianism: How To spell?

The word Pestalozianism is misspelled against Pestalozzianism, a noun meaning "The system of education introduced by Pestalozzi."

Pestalozzianism has double "zz" is mispronounced as "z"
Remember double 'ZZ' in between the strings pestalo & ianism which should not be misspelled with single 'Z'
Wrong Spelling:  pestalo-z-ianism 
Correct Spelling:  pestalo-zz-ianism 
Find more incorrect spellings of Pestalozzianism to spell right way.

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