A school makerspace opened for one extra hour after classes during a four-week trial. More students completed projects, but the teachers did not claim that the longer schedule alone caused the increase. The trial began when two new mentors joined the program, and students were also allowed to reserve tools online for the first time. To separate these changes, the school plans a second trial in which the number of mentors and the reservation system remain unchanged while the closing time varies by week. The first result is still useful because it identifies what should be tested next. It does not prove that every school would benefit from the same schedule. The teachers will also record whether students finish a project or merely stay longer, since time spent in the room and completed work are different outcomes. If completion rises only when mentors are present, the school will not attribute the change to opening hours. By treating an encouraging result as a question rather than a final answer, the team can design a stronger comparison.