real audience,interactive,collaboration,authentic task,choice based,engaging,inquiry,choice,hands-on,cross-curriculum,open-ended question/problem,real-world,public presentation,project management,critical thinking,problem solving,communication,katz and chard, the duke school,multi-disciplinary,process over product,many possible solutions,teacher as facilitator,student choice,student voice,iterative,authentic (to students),student-centered,cooperative,voice,hands on,student lead,project-based learning is ...,product,unexpected outcomes,open ended,authentic,audience,collaborative,facilitation,exploration,curiosity,the project is the learning process,