European Research in Mathematics Education I - Fakultät für ...

European Research in Mathematics Education I: Group 2 277
In Fig. 2 the screen of work in expert mode with Geometry-A is shown. The
geometric image can be rotated with respect to the axis or directly rotated with the
mouse. Information about the surface is given in the right part of the screen.
Unfortunately the package has Russian interface. Let us give some comments to the
information presented at the screen. The main menu (at the top of the screen) has such
devices: Input Data, Screen, Drawing, Rotation, Information, Quit. Information in the
right part of the screen includes: Equation, Type of the Surface, Parameterization,
Canonical Equation, Matrix of Transformation (from the current to the canonical
coordinate system). In the bottom part of the screen the auxiliary available commands
are given.
Fig. 3: Screenshot 3
Fig. 3 illustrates control mode is presented (the presentation of the right answer,
which has the view of the information presented in the previous Fig. 2). The student is
asked to answer step by step questions concerning the object, the equation of which is
generated in in random way and presenting at the screen. An in-screen calculator is
available as well as a way to transfer data between calculator and the program. The
student can skip the difficult question (in this case the program itself gives the right
answer). The statistics about the students’ work is stored in a file and can be used for
self-assessment as well as for teacher evaluation. In control mode the main menu has
such devices: New Task, Right Answer, Statistics, Quit.
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