Currently, teaching through scholastic activities has been widely applied by teachers at all levels. In the article, with this approach, the author have achieved positive results. However, the problems the author is experiencing are: there are no instructional designs for the activities available
as a result, most teachers who wont to employ the approach must prepare their own design. In this paper, the author would like to introduce some scholastic activities that have been on trial with productive results on teaching "equation of the circle".