3 items total
 
Organization: Virginia Standards of Learning
Grade Band: 3rd Grade
Standard Goal: Measurement
 No expectation given for this objective. 
Clock Arithmetic and Cryptography Lesson: Introduces students to modular (clock) arithmetic and how modular arithmetic can be used to encode messages using simple shift, multiple and affine ciphers.
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Clock Arithmetic
Activity: Work with various types of clocks in order to learn about modular arithmetic operations. Parameters: Number of hours on the clock.
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Clock Wise
Activity: Practice reading a clock, input times for the clock to display, or let the clock generate random times for you to read. Choose from three difficulty levels.
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