How we measure distances to starts and planets using parallax, etc. 

This interactive infographic from Number Sleuth accurately illustrates the scale of over 100 items within the observable universe ranging from galaxies to insects, nebulae and stars to molecules and atoms. Numerous hot points along the zoom slider allow for direct access to planets, animals, the hydrogen atom and more. As you scroll, a handy dial spins to show you your present magnification level. While other sites have tried to magnify the universe, no one else has done so with real photographs and 3D renderings. To fully capture the awe of the vastly different sizes of the Pillars of Creation, Andromeda, the sun, elephants and HIV, you really need to see images, not just illustrations of these items. Stunningly enough, the Cat's Eye Nebula is surprising similar to coated vesicles, showing that even though the nebula is more than 40,000,000,000,000,000,000,000 times larger, many things are similar in our universe.

good collection of resources from Jason Byuell about argument driven inquiry in the science classroom. This link includes some sample bio investigations. 

In Sponge Lab Biology's Build a Body students construct a human body system-by-system. To build a body students drag and drop into place the organs and bones of a human body. Each organ and bone is accompanied by a description of the purpose of that bone or organ. The systems that students can build in the Build a Body activity are the skeletal, digestive, respiratory, nervous, excretory, and circulatory systems.

simple electrolysis lab with 9v battery. 

interesting idea for lab write ups-have students add cover letters. 

good library of questions for clickers

Project Noah is a tool to explore and document wildlife and a platform to harness the power of citizen scientists everywhere.

A movie from the time series stack described below (CIL:812) shows an amoeba (Dictyostelium discoideum) trying very hard to ingest a yeast cell (Saccharomyces cerevisiae) that is slightly too large.

 6 essays on why eating meat is ethical in NYT

The diary of a globetrotting gnome investigating the variances in gravity around the world. Find out about my experiment and see my results at The Gnome Experiment Follow me or talk to me on Twitter @kerngnome

Monet had his lenses removed due to cataracts late in life, and therefore could see in UV