Why is cheating so common in school?
Some students might cheat because they have poor study skills that prevent them from keeping up with the material. Many students are highly motivated by grades and might not see a relationship between learning and grades. Students are more likely to cheat when they feel anonymous in class.
Can Google Forms detect tab switching?
Google forms should not be able to find any new tabs/windows open though. Additionally if you really wanted to circumvent that, running a different browser from chrome (Assuming that’s what you’re using) such as Firefox would be undetectable without intrusive software you have to install.
Can canvas see what device you use?
You can view your own interactions with a student, and view a summary of all student interactions in your site. At this time Canvas analytics do not measure activity on mobile devices, with the exception of Analytics Beta which does measure activity across devices.