The title of the article may sound a bit misleading but this is not meant to drive people away from qbasic programming or anything like that. well the title means to say while we are using some method (in science/mathematics) or language (in programming context) we remember them well but the moment we awitch over to something else we tend to forget the previous one !! not good at all.
my father is really particular about such things so he passed me this link, it elaborates two methods of studying to make people remember for a long time.
But dont be misled as these are no shortcut methods and require serious practice