Lectures on Chow-Witt groups

In these lectures, we provide a toolkit to work with Chow-Witt groups, and more generally with the homology and cohomology of the Rost-Schmid complex associated to Milnor-Witt $K$-theory.
Comment: This is an almost final version of the lecture notes on Chow-Witt groups that are going to appear in the proceedings "Motivic homotopy theory and refined enumerative geometry"