Open instructive assets cover a wide extend of online groups, counting online course readings, video recorded addresses, YouTube clips, web-based printed materials outlined for free ponder, activitys and recreations, advanced charts and design, a few MOOCs, or indeed evaluation materials such as tests with computerized answers. OER can moreover incorporate Powerpoint slides or pdf records of address notes. In arrange to be open instructive assets, in spite of the fact that, they must be openly accessible for at slightest instructive utilize.