What does the author mean when he says Miss Granger’s eyes clicked up to a new power level?
Mrs. Granger's eyes are frequently mentioned throughout the story.
Readers are first told about them in chapter two. Chapter two focuses entirely on Mrs. Granger and her reputation as a tough teacher that loves vocabulary. We are told that she is physically a small person, but her eyes made her seem like a giant. They are dark gray eyes that she can turn on "full power." When Mrs. Granger does this, students feel like a "speck of dust."
Mrs. Granger clicks her eyes up to a new power level in chapter five, when Nick is trying to accomplish his time-wasting plan. It could mean that her eyes went from half power to a higher level power (for example, 83% power). It could also mean that Nick has irked Mrs. Granger enough to where her eye power has been turned up to a level that is now beyond what was considered full power.
Either way, Mrs. Granger is definitely using the standard "teacher stare" that alerts students to quit doing the erroneous behavior.
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