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the average effectiveness of a course in promoting conceptual
understanding is taken to be the average normalized gain <g>. The
latter is defined as the ratio of the actual average gain (%<post> -
%<pre>) to the maximum possible average gain (100 - %<pre>)....
(b) Traditional (T) courses ... average <g> for 14...
courses (N = 2048) of 0.23 ± 0.04sd
(c) Interactive-engagement (IE) ... average <g> = 0.48 ± 0.14sd.
(d) Current IE methods need to be improved, since none of the IE
courses achieves <g> greater than 0.69.
Can anyone explain why the IE method, shown to be better,
is in need of improvement?