“…Some laboratories have introduced new educational technologies (e.g., microcomputer-based labs [7] and VPython [8,9]), others have added an emphasis on particular scientific practices (e.g., measurement and uncertainty [10,11], developing testable questions and designing experiments [12,13], and scientific argumentation [14]), while others have pushed the lab course closer to cuttingedge research by introducing modern physics concepts and apparatus (e.g., single photon quantum optics experiments [15,16]), and others have demonstrated improved conceptual learning gains through research-based lab activities [17]. The diversity of responses reflects both the diversity of goals for the laboratory and the flexibility and adaptability of the laboratory environment to meet many different goals.…”