The Council for Exceptional Children . Some students with disabilities may require mathematical tools, such as a multiplication matrix. Students with sequencing and laterality problems may benefit from number lines or place value charts. Various types of visual displays are available. These include arithmetic tables or matrices, an abacus or counting board, or simple number lines that can be taped to a student's desk.
Calculators are another type of mathematical tool.
Procedure Review the test and determine which subtests or sections require the use of a mathematical tool. Also, make sure there is ample space for the student to use the tool. For example, the test may require the demonstration of a variety of mathematical procedures that may necessitate several different tools. In this case, the student would need to know when to use which tool, how to retrieve the tool, and when not to use it. Excerpted from Assessment Accommodations Toolkit .