This in-class activity was used on the first day of Advanced Inorganic Chemistry in lieu of lecture to review symmetry operations and point groups in small molecules. The learning object was adapted to a small group discussion format from a fundamental quiz posted by Barbara Reisner (James Madison University) and a problem set question posted by Adam Johnson (Harvey Mudd College).
In the past, I've always found the IUCr crystallographic pamphlets to be useful when teaching diffraction. They've reorganized their website to make their educational resources easier to find. On this link, you can find the IUCr teaching pamphlets, a short description of how to grow crystals, and other crystallography web resources.
Teaching Pamphlet Topics
Theo Gray has compiled some of his Popular Science columns into a beautiful book of sometimes dangerous experiments, many of them with particular relevance to inorganic chemistry! With chapter names like "Experimental Cuisine", "Doomsday DIY", and "Twisted Shop Class", you know you in for a wild ride. Some particularly intriguing experiments include electroplating a copper design on your iPod, making glass and elemental silicon out of sand, making a burning Mg/dry ice sculpture, anodizing Ti for cool color effects, and creating a "hill billy hot tub" using 600 lbs of quicklime.
http://assign3.chem.usyd.edu.au/spectroscopy/index.php
A series of Java tools for learning about the relationship between molecular parameters (size, mass etc) and the form of the spectral trace. These cover rotational, vibrational, ro-vibrational and electronic spectroscopy.
http://firstyear.chem.usyd.edu.au/calculators/mo_diagrams.shtml
Flash based tools to help with the construction of MO diagrams: