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