Electronic Proceedings of the Seventh Annual International Conference on Technology in Collegiate MathematicsOrlando, Florida, November 1720, 1994Paper C004
CAI in Precalculus 
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A pilot study was done during the Fall 1993 semester to compare
methods of instruction in two sections of Precalculus taught by
the author. One section was designated experimental, the other
control. Three sections of the text material were used in the
pilot study. One section was on graphs of functions and included
the concepts of the vertical line test, piecewise defined
functions, increasing or decreasing functions, odd or even
functions, and symmetry with respect to either the origin or the
yaxis. A second section covered six basic functions, such as the
absolute value function, the square root function, and the cubing
function. This section included the aides to graphing of vertical
shrinking or stretching, reflection about the x axis, vertical
shifts, and horizontal shifts. The third section contained the
basic concepts of quadratic functions, eg., vertex and axis of
symmetry. The experimental group used CAI in lab assignments to
supplement the instruction, while the control group only received
classroom instruction.
The results of the pilot study and a followup study done in the
Spring 1994 semester are reported here. In both studies no
significant differences in test scores were found between the
control and experimental groups.
Keyword(s): precalculus, computer algebra systems, assessment