Before I start I will say my grammar isn't perfect, and I'm not that pedantic, I just thought this was amusing!
My son in year 4 has a grammar and punctuation booklet from school and he did the first 2 pages as set for homework. There are at least three errors on it. Including
The elderly lady continued on his way
I am resisting the urge to get my red pen out 
And that's just the first 2 pages!