The next day, Ms. Jentzen instructed the students to go back to
their earlier lab entries and the systems themselves, and to
work as a team to make claims about why the divers behaved
the way they did. Don asked a research assistant for assistance
and again dictated an entry into his lab notebook, “When you
press down the water level in the diver goes up so the diver
has the ability to sink.” The research assistant then read the