I love Khan. My Ds loves Khan. It's Free. Its contents are just so great.
Today I noticed there is grammar section. I've watched the introductory video, and sounds great. Contents looks great. But, is it going to confuse my ds if I let him try it? Is grammar really different in American or British English?
I am not native English speaker, so I don't really know the difference.
www.khanacademy.org/humanities/grammar/partsofspeech