ddTile - file structure


common
   interactiveFrames
          forensicScience
          foundationalMath
          algebraOne
          geometry
          physicalScience
          
          general
              ddTiles
                  ifFWDDL.html
                  socialStudies8501
                       8501.1.1.1.txt
                       images
                           8501.1.1.1.png
                  lifeScience8...
                       cellDiagram.txt
                       images
                          animalCell10.29.png