I typically assign a series of small projects that each cover one particular technique. Techniques/concepts that I cover are as follows: layering & layer styles, selections (Photoshop Doctoring), masking, filters, and blends.

I then depart from Photoshop to cover XHTML & CSS, and then I return back to help students create banners & background graphics (like buttons for CSS-styled menus).

I’ll have to post on that topic.

We have also discovered many exoplanet systems with gas giant planets larger than Jupiter that have elliptical orbits. According to the IAU defintion, these would not be considered planets!

Pluto is a planet because it is spherical, meaning it is large enough to be pulled into a round shape by its own gravity–a state known as hydrostatic equilibrium and characteristic of planets, not of shapeless asteroids held together by chemical bonds. These reasons are why many astronomers, lay people, and educators are either ignoring the demotion entirely or working to get it overturned.