The Dynamic Number Project
  • Builds on the paradigm of Dynamic  
   Geometry® 
  • Dynamic Number: The direct 
   manipulation of number representations 
   and numerical constructions
  • Goal: The development of software tools 
   to deepen students' conceptions of 
   integers, fractions, decimals, real numbers, 
   and early algebra in grades 2–8 
   mathematics
     The Dynamic Geometry in 
        Classrooms Project
  • Randomized controlled trial of an approach to high-
   school geometry that utilizes Dynamic Geometry 
   software and supporting instructional materials to 
   supplement ordinary instructional practices.
  • Goal: Test the hypothesis that the use of Dynamic 
   Geometry software to engage students in constructing 
   mathematical ideas through experimentation, 
   observation, data recording, conjecturing, and proof 
   results in better geometry learning for most students.
                  The Dynamic Number             The Dynamic Geometry in 
                  The Dynamic Number             The Dynamic Geometry in 
                        Project                     Classrooms Project
                        Project                     Classrooms Project
                 curriculum & software                randomized 
                      innovation                     controlled trial
                                     professional 
                field testing        development            76 classrooms
                                                         students experiment...
           number lines             teachers develop 
                                    technical skills            ...observe...
           dynamic number grids
                                    teachers improve         ...conjecture...
              geometric functions     instructional         ...and prove.
                                       strategies
               fraction representations                do students learn 
                                                       geometry better?
  Shared Aspects of Our Two Projects
  • The Geometer’s Sketchpad®
  • A belief that technology, when properly 
  used, can foster mathematical growth in 
  both teachers and students
  • The need for professional development so 
  that teachers can learn the technology and 
  use it well to promote the goals of the 
  project
   Goals of Technology-Centered PD
            Low-End Goals
            Low-End Goals
       Participants learn the nuts and bolts of 
       the software
       Participants see how the software can 
       help them accomplish exactly what 
       they already do when teaching 
       mathematics