1. 18 x 24 inch pad of smooth newsprint. It looks like the easiest brand to get online is Richeson, which is fine, but I prefer Borden and Riley or Pro-Art
2. A Conte 1710 B or 2B pencil sharpened to a long taper using a razor blade and sanding pad
3. A kneaded eraser. Design brand seems to be the best, and most easily found.
I clip the pad to a board, support it on my knees/thighs and lean it against a vertical support (drawing horse). Keeping the board as vertical as possible and directly between myself and the model.
I use the side of the pencil for the broad shadows and the point for detail work. I will also use the "blade" of the pencil for line work. To clarify for broad strokes I use it like I am spreading butter on toast, for line work more like I am cutting a steak, and for details more like pushing a sowing needle through cloth. For all three I hold it underhand, more like a sword than a tradition pencil
note: materials not to scale