This next one is one of my Desmos activities that I use with my senior students. If you have a Desmos account (which is free and makes activities easy to set up before time and just link to) you can save it to your templates. This helps you explore the standard form of a parabola by clicking and dragging the focus or by moving the sliders to show the infinite possibilities from the standard form.
Or you could use the other Standard form
I think these work well for demonstrating how all parabolas fit into the standard forms. Let me know how these resources work for you or if you have a similar resources.