The other lower-tech solution to teaching at the right level is simply to have schools shuffle classes for one hour each day so that all students go to the class that is at their actual level. Sometimes, this requires more teachers, depending on the school; it also requires more testing, and it will sometimes lead to awkward social interactions with children of very different ages in the same class. This approach has also been widely tested, and while it results in less additional learning than with the use of tablets, it is also cheaper. In total, one year of this approach delivers the
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