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This means when you create rules , you should give the highest priority to the rule that you want the system to try match first , next highest to the second rule and so on . This will enable the correct permissions when you create files and directories . Although games may be getting increased recognition as effective learning tools , a remaining barrier to their acceptance in schools is the dearth of solid research on what students learn in specific content areas when they create games . The latter is a neat feature that makes use of the course information you include when you create assignments ; for example , you can quickly view all your upcoming Chemistry tasks with the click of a button .