Yes. We have worked closely with the American Foundation for the Blind to make our content accessible (ada compliant). (For instance, SoftChalk lessons can be read by screen readers.)
For more details, please see our; :
SoftChalk VPAT (Voluntary Product Evaluation Template) at: http://support.softchalk.com/FileManagement/Download/7afe409ca5204fcab2fa896427121015
We also have general information about SoftChalk's accessibility at: http://softchalk.com/products/softchalk/accessibility