A note on my biggest grammatical pet-peeve:

When you're talking about the 1990s, or the 1830s, or the 1250s, you're not talking about something that belongs to the year 1990, or 1830, or 1250. So unless your sentence reads, "Britney Spears' Hit Me Baby One More Time' was 1250's #1 single," don't add an apostrophe between "0" and "s." It isn't required at all!

I know a better way to teach kids grammar: teach them foreign languages. We need to start enforcing that in our schools. They'll come away with a better understanding of English and grammar than an "old-school" grammar class could ever provide. Sprechen Sie Deutsch! Parlez Français! Hable Español! Parli Italiano! Gavarite Russkiy!