There are many different and varied invasive species, but for this lesson the key points are that the species is (1) not native and (2) causes harm to either the economy or the environment. This activity will allow students to focus on one invasive species and present the information that they find about their species to classmates in a classroom go-around at the end of their research. Background Students begin this activity by watching a PowerPoint on “Ten Important Invasive Species” that are problems at different locations in the United States. There are many different and varied invasive sp Duration: 90 Minutes.