My dad was a math and physics teacher and he had a very similar theory around the working memory. However he also thought that the problem for those students t

My dad was a math and physics teacher and he had a very similar theory around the working memory. However he also thought that the problem for those students that had difficulties with math was that the working memory was often filled up with other stuff than the math that they were working on. It could be anything from difficulties to concentrate to problems with holding the pen correctly and therefore the working memory was overflowed.