Check Your Spelling Please

Ok, I know I'm not the best speller in the world, but here is what your public schools are putting out these days.  Check this out below.  Yes, there is such a place as a 'desert'.  However, you don't eat a desert.  You eat a 'dessert'.  And yes, 'your' is a word.  However, you don't own a 'very welcome'.  'You're' does, however, fit in correctly in the following sentence:  'You are very welcome'.