Strengthen Practice Test

A school principal argues that banning smartphones during class improved student attention. She notes that in the month after the ban, teachers recorded fewer instances of students being off-task, and the average score on weekly quizzes rose modestly. She also points out that most students complied with the ban because phones were collected at the start of each period. The principal concludes that the smartphone ban caused the improvement in attention and learning, and she recommends extending the ban to lunch and after-school study halls to further boost academic performance.

A tech team lead claims that switching to a new project-management app improved on-time completion of tasks. She notes that in the quarter after the switch, the percentage of tasks finished by their deadlines rose from 70% to 82%. She also reports that the app sends automatic reminders, and team members say they now notice deadlines earlier. Therefore, she concludes that the new app caused the improvement and that adopting it companywide will make projects more reliable. Since on-time completion improved right after the switch, she treats the app as the main reason.