1. Beginner’s and Expanded Beginner’s Abacus An Introduction by Sara Larkin Math Consultant Iowa Educational Services for the Blind and Visually Impaired

2. Layout

3. Position Flat surface Bars should be vertical on the table
Can use the following to keep it from sliding on the tabletop
Dycem Non-Slip Material
Rubber shelf liner
Grip-It shelf liner
Velcro

4. Progression of Skills One-to-one Correspondence
Setting/counting numbers in the ones column
Setting/counting numbers in the tens column
(Setting/counting numbers in the hundreds column)
Using multiple columns to set/count numbers
Direct addition
Regrouping or Indirect addition
Direct subtraction
Regrouping or Indirect subtraction

5. Terminology Setting – beads are moved up to take on a certain value
Clearing – beads are moved down to bring the value back to zero
Ones column – right most column of rods
Tens column – second column of rods from the right
Hundreds column (expanded) – third column of rods from the right

6. Common Core – Kindergarten through 2nd Grade
Domains
Counting and Cardinality
Operations and Algebraic Thinking
Numbers and Operations in Base Ten
Standards for Mathematical Practice
1. Make sense of problems and persevere in solving them.
2. Reason abstractly and quantitatively.
3. Construct viable arguments and critique the reasoning of others.
4. Model with mathematics.
5. Use appropriate tools strategically.
6. Attend to precision.