Arithme-Tic-Toc.pdf

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2/10/2018 Arithme-Tic-Toc 1/3 GRADE: 6-8,9-12 PERIODS: 2 STANDARDS: AUTHOR: Doug Schmid Location: unknow n Arithme-Tic-Toc Students will be introduced to modular arithmetic by first examining a five-hour analog clock and its mathematical properties. Then students will investigate patterns and relationships that exist in 12-hour addition and multiplication clock tables. Instructional Plan Objectives + Standards Materials Assessments + Extensions Questions + Reflection Related Resources Print All Because of its familiarity to students, one simple way to introduce modular arithmetic is with a 12-hour analog clock. Begin this lesson by writing 10 + 4 = 2 on the chalkboard. Most students will object to this untrue statement, but then ask, "Can you think of a situation in which this statement might be true?" There are a number of possible answers that students could suggest: 10 a.m. + 4 hours = 2 p.m.
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