Why wikipedia ain't that bad.
Fun diagram. Fits in well with accountable talk & whiteboard meetings.
Great visualization of the H-R diagram- makes much more sense than just throwing a H-R diagram at students right away.
Nice open ended activity using cartoons. :-)
Shown to 2nd Block 9th graders (2/5/15)
Excellent description of the expansion of the universe.
Nice activity stations style activity. Will need tweaking for freshmen.
Using a spring, 200g mass, and CV buggy, find things.
Watched all classes 2014-15
Nice debunking & resources for educating on "toxins" and natural & man-made chemicals.