character: Cathy the Clock
topic: Reading Analog and Digital Clocks
grade: 4
subject: Mathematics
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character: Timmy the Timer
topic: Understanding Time Zones
grade: 4
subject: Mathematics
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character: Sunny the Sun Dial
topic: Using Shadows to Tell Time
grade: 4
subject: Mathematics
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character: Lucy the Leap Year
topic: Why We Add a Day Every Four Years
grade: 4
subject: Mathematics
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