# Abacus, Side-to-side, Blue and Yellow

# 004083

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Item #: 004083 K-8

Warning
Choking Hazard
• Small parts Not for children under 3 yrs.

#### Product Description:

A side-to-side plastic bead abacus. There are 10 wire rows of 10 beads each on a 9" x 8" plastic frame. The most helpful feature of the abacus is the use of blue and yellow colored beads -there are 5 of each color per row- which makes it more effective for all operations.

#### Publisher Description:

This abacus features a frame that is thicker than the beads, which allows abacus to lie flat on student desks. Abacus activities offer students tactile counting practice and visual reinforcement of math facts. Includes 10 rows of 10 beads in 2 colors grouped in fives for ease of use. Abacus measures 8 1/2" L x 9 1/2" W x 1/2" H.

Category Description for RightStart Mathematics:

Based on research comparing the differences between Japanese first grades and first grade classrooms in the U.S., this curriculum incorporates certain aspects from Asian math programs such as non-counting strategies and, for us, an alternative number naming system. In this program, the student is taught to see quantities in groups of fives and tens. When asked to add 9 + 7, instead of counting 7 up from 9, you would take 1 from 7 to make 10 and 6. This program also uses a unique number naming system. Asian words for numbers greater than 10 implicitly give you a feel for the base ten system. Literally translated, eleven is "ten-one," twelve is "ten-two," and so on. RightStart students learn to count the "math-way" before they are taught the less intuitive words for 11 to 19.

I cant summarize this program better than the creator, so let me quote from the manual:

"There are eleven major characteristics.

1. Refer to quantities of up to 3 as a group; do not count individually.

2. Use fingers to show quantities up to 10; teach 6 to 10 as 5 plus a quantity.

3. Avoid counting procedures for finding sums and remainders.

4. Once quantities 1 to 10 are known, proceed to 10 as a unit. Use the "math way" of counting; say for example, 1-ten 1 for eleven, 1-ten 2 for twelve, 2-ten for twenty, and 2-ten 5 for twenty-five.

5. Use expanded notation (overlapping) place-value cards for recording 10s and 1s

6. Proceed rapidly to hundreds and thousands; use place-value cards. Provide opportunities for trading between ones and tens, tens and hundreds, and hundreds and thousands with manipulatives.

7. Only after the above work, give the traditional English names for quantities 20 to 99 and then 11 to 19.

8. Teach tens-based strategies for addition and subtraction facts that have a sum > 10. Teach informal solutions and mental computation before written algorithmic work.

10. Teach four-digit addition and subtraction on the abacus; let the children discover the paper and pencil algorithms.

11. Short division precedes long division, which is taught in fourth grade."

In Level G, students continue to practice arithmetic, fractions and decimals, while they begin to also explore triangles, area, volume, ratios, Pythagorean Theorem, tiling, and other new concepts.

CHOKING HAZARD (1). Not

Category Description for COMPREHENSIVE PROGRAMS - ELEMENTARY:

Primary Subject
Mathematics
K
8
EAN
765023843354
Format
Other
Brand Name
Learning Resources
Weight
0.55 (lbs.)
Dimensions
7.5" x 10.0" x 1.0"
Browse 1 question Browse 1 question and 33 answers
Why did you choose this?
Rainbow Resource Center Store
I bought this as an extra for my younger son.
on Jun 17, 2022
school recommended
on Aug 27, 2021
I bought this as an extra for my younger son.
on Jun 17, 2022
I thought it would go well with my daughter's 2nd grade math lessons.
on Sep 5, 2021
I thought it would go well with my daughter's 2nd grade math lessons.
on Sep 5, 2021
part of preschool requirement
on Jun 24, 2021
5.0 / 5.0
5 Reviews
5 Stars
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Rated 5 out of 5
good for singles and place holders
has a 1s side and and a 1s, 10s, 100s, 1000s side which is very nice.
October 1, 2020
Purchased
1 year ago
Rated 5 out of 5
Basic Math Manipulative
Every student should have one at their desk. They color divisions help the child conceptualize the number: i.e. "the two fives strategy" 8+7 is 5 and 3 + 5 and 2. They recognize the two fives equal 10 and the only thing they have to add is the 3+2.
September 20, 2020
Purchased
1 year ago
Rated 5 out of 5
This has helped my 5 year old make sense of both addition and subtraction. It’s also super helpful with counting by 5’s. Such a great resource!
May 30, 2020
Purchased
over 2 years ago
Rated 5 out of 5
Excellent Place Value and Numeration teaching tool.
We purchased it for use in a Right Start math class. If you don’t use that curriculum, it also adds easily to any math program, especially if you have a visual/kinethetic learner. Math concepts from K through middle school can be taught and solved with this Abacus because of the place value side.
March 12, 2018
Purchased
over 4 years ago
Rated 5 out of 5
Abacus to teach addition & multiplication
This abacus is made very well as my 6 year learns and plays with it. I also appreciate that it came with a small instruction book.
January 18, 2018
Purchased
over 4 years ago

help desk software