One of the most cited papers in the area is Frank Dempster's paper about the failure of educational systems to adopt spaced repetition: http://andrewvs.blogs.co

One of the most cited papers in the area is Frank Dempster's paper about the failure of educational systems to adopt spaced repetition: http://andrewvs.blogs.com/usu/files/the_spacing_effect.pdf http://andrewvs.blogs.com/usu/files/the_spacing_effect.pdf Although the paper was was written almost 30 years, little has changed.