Can I use a split screen without having two monitors?

With the Chrome extension Dualless, you can easily split your Chrome browser and its tabs in two.

Download it from the Chrome Store here

After clicking the extension's button, you have the option of splitting your windows in a number of different ways:

Students can use this on their Chromebooks, so that they can have a text on the left of their screen, and a Google Form on the right to answer questions.  This is an easy way to mimic the SBA and prepare students for the format of the test.