theodp writes: The Education Revolution will be patented. USPTO records show that Khan Academy is seeking a patent for Systems and Methods for Split Testing Educational Videos. From the patent application: "Systems and methods are provided for comparing different videos pertaining to a topic. Two different versions of an educational video may be compared using split comparison testing. A set of questions may be provided along with each video about the topic taught in the video. Users may view one of the videos and answer the questions. Data about the user responses may be aggregated and used to determine which video more effectively conveys information to the viewer based on the question responses." Now it's up to the USPTO to decide if something like the test and control studies conducted 40+ years ago (pdf) by the PLATO system to measure the effectiveness of different teaching methods would count as prior art. In response to an earlier post on Khan Academy's pending patents on learning computer programming and 'social programming,' Slashdot user Khan Academy said that the nonprofit is using patents for good, so not to worry.