We highly recommend that all students review the site links prior to registration for a C School. Students can also find CG-3PCX C School policy on the C School web site. Students should read this information prior to requesting a C School.
FHD is higher resolution-- 1920x1080 (aka 1080p Full HD). HD+ is a bit lower. Usually 1680x1050 or 1600x900 or such. It's mostly personal preference, but I prefer 1080p full HD.
LEDs controlled individually (or in clusters) to control the level of light/color intensity in a given part of the screen. The iPhone 5 has an LED-backlit TFT IPS LCD, while the Sony Xperia S is an example of an LED-backlit TFT TN LCD (also referred as TFT LCD).