Calculators are commonly used at every education level. Calculators that can perform statistical or scientific calculations, manipulate matrices, and plot functions on a graph are particularly helpful in the study of higher-level mathematics. Although most scientific or graphing calculators are not accessible to someone who does not have usable sight, there are options available that allow students who are blind to use these tools successfully.
A number of talking scientific calculators are available on the market, although no single calculator may function as needed at all educational levels. This means that an assessment of the features needed by the student must be done to ensure that the best calculator for them is selected. Susan Osterhaus at the Texas School for the Blind has compiled a review of the functionality of various talking scientific calculators which may help in the selection process. The Orion TI-30XS MultiView Talking Scientific Calculator is one well regarded talking scientific calculator that may meet the needs of a variety of students.
Another option is to use a portable electronic notetaker with advanced math functions. Some notetakers combine speech synthesis and refreshable Braille that can be used by students who are blind for performing trigonometric and logarithmic calculations. Check with the notetaker manufacturer to see if a scientific calculator function is supported.
There is also software available which can provide speech access to a scientific calculator application. Some of these emulate a common calculator interface, and some can also provide audio access to graphs. The Audio Graphing Calculator (AGC) is an example of an accessible Windows-based software program that features a graphing calculator capable of displaying graphs both visually and audibly as a sonified tone graph.
To find out more about accessible math consult the Knowledge Base articles What are some techniques for creating Braille math materials? and Why is accessible math important?