This is a quick and easy way to get formative feedback on student understanding of the concept of "opposition": goo.gl/jBDECc. Imagine all the other options for formatively assessing using this technique!
If you have a pdf that you'd like to enlarge, you can do so right from within Adobe Reader. Here's how: Go to "Print", then choose "Poster": Next, set the scale to "200%" for 4 pages (experiment for larger) and I prefer no overlap, so set it to 0: PRINT!!