Modern Learning Aids; A Brief Course in Mathematics for Elementary School Teachers - Lesson XXIV: Ratio, Rate, Percent; Modern Learning Aids; A Brief Course in Mathematics for Elementary School Teachers; Lesson XXIV: Ratio, Rate, Percent

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  • Title Card: A Brief Course in Mathematics for Elementary School Teachers
  • Title Card: XXIV Ratio, Rate, Percent
  • Title Card: Stewart Moredock
  • Physical Examples of Comparisons by Division 3 to 1, 12 ÷ 3, 12/4
  • 2 to 3, 6 ÷ 9, 2/3
  • 3 to 2, 9 ÷ 6, 3/2
  • Summary of Generalizations
  • Comparing Fractions 2/3 to 5/6
  • Equivalent Ratio Expressions
  • Summary of Generalizations
  • Example: 85 to 51
  • Example: 6,300,000 to 4,500,000
  • Pairs of Numbers to Indicate Rates
  • Using Rates to Establish Equivalent Ratios
  • Example: 2/5 = 14/n
  • Percents Example: 25%
  • Applications of Percent 13 is What % of 20
  • What is 15% of 30
  • 48 is 80% of What Number
  • Summary of Lesson
  • Title Cards: Credits XXIV Ratio, Rate, Percent
  • A Brief Course in Mathematics for Elementary School Teachers
  • Produced by School Mathematics Study Group
  • With financial support from The National Science Foundation
  • Lecturer: Stewart Moredock, Sacramento State College Assistant: Jack Abad, San Francisco Unified School District
  • Live Camera Recording: W.A. Palmer Films, Inc San Francisco