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Often these seasonal patterns match up with yearly high school or college entrance exams, and are due to students studying the topics.
by lwneal 5y ago
Often these seasonal patterns match up with yearly high school or college entrance exams, and are due to students studying the topics.
- IAmGraydon 5y agoInteresting. That would make sense. They drop off sharply every June, when summer break begins. Thanks for the input!