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We went to the U.S. Patent & Trademark Office to get the lowdown on the CRISPR gene-editing patent dispute. Read C&EN's coverage here:

Lesson and Units from Science Box

China is engulfed in an extreme amount of pollution, and it's causing health problems for people living in this area! How can we help fight some of these diseases? Laci explains how broccoli could incredibly helpful when it comes to ridding the body of deadly toxins! Follow DNews on Twitter: http://www.twitter.com/dnews Follow Laci on Twitter: http://www.twitter.com/gogreen18  Read More: China's toxic air pollution resembles nuclear winter, say scientists http://www.theguardian.com/world/2014... "Air pollution now impeding photosynthesis and potentially wreaking havoc on country's food supply, experts warn."

Browse the collection of free notes, activities, labs, lesson plans, and other course materials in the Worksheets and Lesson Plans section.

This two minute animation describes the Octet Rule and explains the difference between ionic and covalent bonds.

Mr. Andersen shows you how to determine if a bond is nonpolar covalent, polar covalent, or ionc.

PBL units for variety of topics

3:47 video: Vinegar may have a powerful smell, but did you know it's actually a weak acid? In the chemical economy, acids actively give away their protons while bases actively collect them -- but some more aggressively than others. George Zaidan and Charles Morton use the currency of subatomic particles to explain this unseen exchange.

The complex systems of high school dating and chemical reactions may have more in common than you think. Explore five rules for speeding up chemical reactions in the lab that might just land you a date to a dance!

5:10 video: extended from Study.com showing lactase example

In order to be useful in treating human infections, antibiotics must selectively target bacteria for eradication and not the cells of its human host. Indeed, modern antibiotics act either on processes that are unique to bacteria--such as the synthesis of cell walls or folic acid--or on bacterium-specific targets within processes that are common to both bacterium and human cells, including protein or DNA replication. Following are some examples.

10 second video showing bacerial killed by penicillin

4:43video, Vitamins are the building blocks that keep our bodies running; they help build muscle and bone, capture energy, heal wounds and more. But if our body doesn't create vitamins, how do they get into our system? Ginnie Trinh Nguyen describes what vitamins are, how they get into our bodies -- and why they are so crucial.

The Innovative Technology in Science Inquiry project engages students in STEM activities through the integrated use of technologies that include modeling, computational thinking, and real-time data acquisition. This comprehensive project will assist teachers in preparing diverse students for STEM careers by engaging them in exciting, inquiry-based science projects.

array of HS science lesson from non-profit Science Pioneers in Kansas City, MO

How do we know what matter is made of? The quest for the atom has been a long one, beginning 2,400 years ago with the work of a Greek philosopher and later continued by a Quaker and a few Nobel Prize-winning scientists. Theresa Doud details the history of atomic theory.

4 min video explaining the Lotus effect

Teacher site with a solid collections of labs

properties, orbitals, isotopes, compounds