Introductory physics students have Newton’s laws drilled into their minds, but historically questions related to relativistic motion and accelerated frames have been avoided. With help from the metric equation, these 3-vector laws can be extended into the relativistic regime as long as one sticks with only one reference frame (to define position plus simultaneity), and considers something students are already quite familiar with, namely: motion using map-frame yardsticks as a function of time on clocks of the moving-object. The question here is: How may one class period in an intro-physics class, e.g. as a preview before kinematics or later during a day on relativity-related material, be used to put the material we teach into a spacetime-smart context?