Viruses are all around--and within. They replicate inside the cells of living organisms. An estimated 1.6 million to 40 million of them occupy each cubic meter of the air people breathe. The activity described in this article helps students understand how the structure of a virus allows it to infect a specific set of organisms and cell types.…

This article describes how one science teacher based an activity on designing smartphone apps to clearly and concisely communicate the interdependent relationships of a biological ecosystem. The teacher designed the activity to address several aspects of the latest science standards. Students needed to understand their ecosystem and synthesize new…

Nowadays, there are lots of digital resources available to teachers. Tools such as Teachers' Domain, an online digital library (see "On the web"); interactive whiteboards; computer projection devices; laptop carts; and robust wireless internet services make it easy for teachers to use technology in the classroom. In fact, in one…