Today we introduced the concept of the z-axis. We discussed how this could be visualized and re-created on paper. I have included the notes for this topic with the following link.
Note that the orientation of the axis is not particularly important as long as you label the positive and the negative sides of each axis.
The homework for the evening was to review Focus B, pages 13-17 to help you get a better idea of how to visualize the third dimension.