By making measurements on single frames of video they have made themselves, students can explore the "fine structure" of events that take place quickly, such as balls bouncing, or paper airplanes being thrown. They can also examine patterns of motion that show up in jump rope, juggling, or gymnastics.

  CamMotion provides a palette of on-screen tools for measuring position, distance, angle, and area, among others. A graphical overlay window provides a growing record of the data being collected against a background of a single video frame. To account for pan and zoom in the video, tools are available to change the scale of the data coordinates and to specify an anchor point whose position on the screen changes over time.

  Individual datasets can be combined in a worksheet within which a set of transformations (e.g. taking the differences between consecutive measurements) can be applied. A graph window provides a flexible environment in which several different curves can be compared. The user can select a section of either the graph or the worksheet and see the piece of the video that corresponds to that slice of the data.

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