Video Trainings from Iowa on Abacus
Submitted by Charlotte Cushman on Sep 08, 2015
Sara Larkin, Math Consultant for the Iowa Educational Services for the Blind & Visually Impaired, presents a series of video trainings on how the abacus can be used for concept development and computation in mathematics. Topics include:
Beginner's and Expanded Beginner's Abacus
- Part 1 An Introduction to the Beginner's Abacus
- Part 2 Beginning Concepts and Counting
- Part 3 Adding and Subtracting without renaming/regrouping
- Part 4a Adding and Subtracting with renaming/regrouping (counting method)
- Part 4b Adding and Subtracting with renaming/regrouping (inderect method)
- Part 5a Adding and Subtracting with renaming/regrouping (counting method - expanded)
- Part 5b Adding and Subtracting with renaming/regrouping (indirect method - expanded)
Cranmer Abacus
- Part 1 Introduction to the Cranmer Abacus
- Part 2 Setting and Clearing
- Part 3 Basics of Addition
- Part 4 Addition Rule of 4
- Part 5 Addition Rule of 9
- Part 6 Addition Rule of 49 and 99
- Part 7 Basics of Subtraction including the Basics of Subtraction Powerpoint
- Part 8 Subtraction Rule of 5 including the Rule of 5 Powerpoint
- Part 9 Subtraction Rule of 0 including the Rule of 0 Powerpoint
- Part 10 Subtraction Rule of 50 and 00 including the Rule of 50 and 00 Powerpoint
- Part 11 Multiplication including the Multiplication Powerpoint
- Part 12 Division including the Division Powerpoint
- Part 13 Shortcuts and the Indirect Method including the Shortcuts Powerpoint
