Can working memory actually be improved?
No program has been definitively proven to increase working memory in any generalizable way. 


  The authors conclude that memory training programs appear to produce short-term, specific training effects that do not generalize. Possible limitations of the review (including age differences in the samples and the variety of different clinical conditions included) are noted.However, current findings cast doubt on both the clinical relevance of working memory training programs and their utility as methods of enhancing cognitive functioning in typically developing children and healthy adults.


-Is working memory training effective? A meta-analytic review.