"We really need to get the government involved," said one student, holding his graph up to USDA scientist Steve Seefeldt. Dr. Steve studies methods to control "invasive" plants, plants that have been introduced to an area by humans and have potential to spread rapidly and negatively affect ecosystems. The first grader and his…

Lists ten characteristics for a suitable focus topic for open-ended science problems. Examples of appropriate focus statements in the areas of life, earth, and space science are included. Discusses options open to teacher and student in providing open-ended learning. (CS)