Educational Apps that teach Math Concepts, Skills and Problem Solving

In the  past three posts, I have discussed how a variety of apps can support students with meeting IEP goals, addressing automaticity and with helping those with visual-spatial and/or fine motor challenges.  Still, in order for students to become effective math problem solvers, students must also develop a conceptual understanding of math principles.  Often times all students benefit through the use of manipulatives (like blocks for counting); these types of learning tools are now also available virtually!

One terrific resource is the National Library of Virtual Manipulatives that is maintained by Utah State University.  It has a lot of options for users including basic numbers/operations to more sophisticated math tools like algebra and geometry.  It is also leveled pre-K through grader 12.  Unfortunately, despite saying they have a free version; I could not download it.

Another possible resource is Internet 4 Classrooms.  This is free (yeah!) and has resources from pre-K through 8th grade.  There are wonderful activities to help students learn (with visuals) key concepts.  This is a link to the Kindergarten resources: http://www.ixl.com/math/kindergarten
This site also has a reader.  Here's a screenshot of a Kindergarten problem that is available:

Source: Dell, A; Newton, G and Petroff, J.  (2012).  Assistive Technology in the Classroom: Enhancing the School Experience of Students with Disabilities. Pearson Education.