Resource
Video Trainings from Iowa on Abacus
Video trainings on the use of the abacus to teach mathematics to students who are blind or visually impaired
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
See all Math Resources from Iowa Educational Services for the Blind & Visually Impaired.