Dyscalculia: News from the web:

A substantial number of childrendtypically those living in lowincome communitiesdstart kindergarten with inadequate mathematics knowledge (Griffin, 2002; Jordan, 2007; Siegler, 2009;
Starkey & Klein, 2008). Effective and scalable mathematics interventions for economically disadvantaged preschoolers are
needed because math knowledge measured at school entry predicts both secondary school academic success and future economic
opportunity (Duncan et al., 2007; Geary, Hoard, Nugent, & Bailey,
2013; Watts, Duncan, Siegler, & Davis-Kean, 2014). This study
tested Math Shelf, a tablet computer curriculum designed to
improve at risk preschoolers’ mathematics performance

Read all about it: HERE