Knot Theory is the study of knots and links in 3-space. It is a fundamental part of low-dimensional topology, but knots have found applications in biology, chemistry, physics and beyond. The classification of knots is the theory’s main goal, a hard and unsolved problem, chiefly studied by means of knot invariants. This class is an introduction to knot theory, and will present many examples of knots, and study a host of knot invariants: The Alexander and Jones polynomials, knot genera, etc.