The system has its detractors. First, it may not be much use beyond numerate subjects suchas maths and the sciences; KhanAcademy does have a few history offerings, but they are lessconvincing than the huge number of maths and science ones. Second, even in these subjectsKhanAcademy implicitly reinforces the sit-and-get philosophy of teaching, thinks FrankNoschese, a high-school physics teacher in New York. That is, it still teaches to the test,without necessarily engaging pupils more deeply. Worse, says Mr Noschese, KhanAcademysdeliberate gamification of learningall those cute and addictive meteorite badgesmayhave the disastrous consequence of making pupils mechanically repeat lower-level exercisesto win awards, rather than formulating questions and applying concepts.
这种模式也招致了一些批评。首先,在除了数学和科学这样屈指可数的学科之外,这种做法鲜有用武之地。比如比起大量的数学课和科学课来说,Khan学院网站虽然确实有一些历史课程,但数量较少,难以证明这样的方法对这个学科依然奏效。再者,纽约的高中物理老师Frank Noschese认为,即使对数学这样的学科来说,Khan学院暗中强调了填鸭教育的教学思维,也就是说,它还是属于应试教育,并没有让学生们参与到学科的更深层次。更有甚者,Noschese先生还说,Khan学院有意的使学习游戏化,这会产生灾难性的后果,比方说所有那些既有趣又让人上瘾的彗星徽章会诱使孩子们为了赢得奖励来不断机械重复低水平的练习。
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