Cranmer Abacus InstructionBy: Carmen Willings
teachingvisuallyimpaired.com Updated May 27, 2024 An abacus is a wonderful tool that can assist students in performing mathematical operations. The abacus teaches the student the process of calculation and leads to a better understanding of numbers and number sense. The following are points on the benefit of the Cranmer Abacus.
By emphasizing the unique role of the abacus in teaching mathematical skills and its accessibility through APH quota funds, you're highlighting its significance as a valuable tool for students who are blind or visually impaired Abacus BasicsUnderstanding the basics of the Cranmer Abacus is essential for effectively using this tool for mathematical calculations. Here's a breakdown of its key components and functions:
Understanding these fundamental aspects of the Cranmer Abacus sets the stage for effectively using this tool for mathematical operations. It provides a tactile and visual representation of numbers and their place values, facilitating mathematical understanding and calculation Setting & Clearing NumbersNumbers are "set" when they are recorded and "cleared" when they are removed or erased.
Additional Resources...Teachers of Students with Visual Impairments (TVIs) may need refreshers and practice in using the abacus as they can go years without having a student who requires this type of instruction. Thankfully, there are tools available to refresh skills. There are different methods of teaching the abacus, the following resources provide instruction in some of these methods. Additionally, YouTube videos are available online that instruct on how to perform various calculations.
![]() Abacus Made Easy Second Edition: A Simplified Manual for Teaching the Cranmer Abacus This manual, available from APH, provides simplified instructions in setting and clearing numbers and perform operations including addition, subtraction, multiplication, division, decimals, fractions, percent, and square roots on the abacus.
![]() Abacus Basic Competency: A Counting Method
This instruction manual, available from APH, teaches abacus skills in the four basic math operations. This abacus instructional system uses the Counting Method instead of the traditional indirect method. TSBVI
Susan Osterhaus, along with other TVI's, have math resources and videos on abacus use and instruction on Texas School for the Blind. |
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