With the school year beginning this week in much of the U.S., teachers thinking about adding the topic of invasive plants to their curriculum should visit the Mass Invaders website. The site was developed as a companion to the poster you see above. While it is geared towards Massachusetts residents, it has dozens of links and several hundred photos, sure to be useful no matter what part of the country you call home. If you are a teacher in Massachusetts you can order a copy for the cost of postage (a mere $1.25!) by clicking on the "About" link at the website.