Abstract
The purposes of this article are to consider the educational significance of teaching mathematical knot theory at senior high school, and to discuss the possibility and benefits of teaching knot theory through "mathematical activities" as follows: After studying the notion of "knot invariants", that is, linking number, tricolorability and Jones polynomials of knots, the students find various properties of knots by experiments or investigations, confirm them, generalize their own results and announce their research results. Our research is based on teaching experiments in a senior high school.
