Final answer:
The question "Who is your favorite teacher this year?" is the least helpful for Joseph's survey about the positive effects of Internet usage on educational performance because it does not relate to children's use of educational Internet resources.
Step-by-step explanation:
Among the survey questions listed, the least helpful for Joseph's research on the positive effects of Internet usage for children's educational performance would be "Who is your favorite teacher this year?"
This question does not directly relate to the use of the Internet as an educational tool or resource. The other options (using a tablet for classwork, current GPA, and favorite educational websites) are more closely connected to the thesis and could provide data to support or refute it.
Critical thinking about the discrepancies in research findings regarding the use of technology by students suggests that an educational leader should consider the context, quality, and relevance of these studies to their own educational setting. The ease of Internet access and reliance on social media can impact various aspects of life, including negative consequences which need to be managed responsibly.