Can someone tell me how to do split screen on windows 8?

I've googled and also look at youtube vids. When I try it, I do end up with a split screen [b]but[/b], I never seem to be able to split what I actually [b]want[/b] to be split on my screen. usually word and Internet so I can have my instructions or readings available as I'm taking notes on them. It's annoying having to click on internet, then go to word, then back to Internet, back to word ...