Abstract The paper deals with
two aspects of a computer-based analytic geometry instruction:
students' achievements, and achievement decay rates. A new
mathematics learning environment---a dynamic and interactive
one---is being built with introduction of computers and GeoGebra
in the classroom. The subject material was introduced to the
students mostly through GeoGebra dynamic worksheets. Students of
the experimental and the control groups went through three tests
within an eight-month period. The tests were different in terms of
technology used by the experimental group and the two aspects we
took into consideration. In the first two tests we observed
students' achievements in different learning environments. The
experimental group students showed a lower performance when
solving problems in a non-computer environment than they did in a
computer-based environment. However, we identified types of
problems that are easier to solve in a computer-based environment,
and others that do not necessary require computer usage to be
quickly solved. This helped us formulate better strategies while
choosing types of problems and appropriate ways and technologies
to solve them. Parts of the third test helped us estimate
achievement decay rates for both groups. Results indicate very
close achievement decay rates for both, experimental and control
groups.
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