Tesselating or Tessellating: How To spell?
The word Tesselating is misspelled against Tessellating, which is present continuous of "Tessellate"
Tessellating has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings tesse & ating which should not be misspelled with single 'L'
Wrong Spelling:  tesse-l-ating  Correct Spelling:  tesse-ll-ating 
Find more wrongly spelled words of Tessellating to spell it well.