In the second and third year, a researcher designed problem-solving instrument was developed with input from participating teachers. This instrument presented students with a problem at a local park where soda pop cans were not being recycled (there was a $0.10 refundable deposit on every can). The students explained in writing how they would approach solving the problem. The solutions were evaluated with a problem-solving rubric consisting of “Understands problem,” “Identifies what is known about the problem," “Identifies what needs to be known to solve the problem," “Determines how the data need to be manipulated to solve the problem," “Describes use of technology," “Describes how to present findings,” and “Collaborative learning.”