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"Display resolution versus pixel resolution Those figures both refer to pixel resolution, a stat that until last year generally didn't differ from display resolution. The difference is important, and I continue to be annoyed that neither Apple nor Google make it easy to understand what display resolutions their screens show. The difference between the two can be summarized like this: Display Resolution: How much can you see on a screen Pixel Resolution: How clear or sharp the image is that you see Display resolution: how much you can see 

Great infographic on teacher responses regarding effectiveness of education materials.