Difference between revisions of "Accessibility"

From GeoGebra Manual
Jump to: navigation, search
(→‎Keyboard Shortcuts: {{KeyCode|Space}} can be used to start/stop a slider animating)
({{KeyCode|+}} and {{KeyCode|−}} can be used to move a point on a path (eg on a circle))
Line 23: Line 23:
  
 
{{KeyCode|Escape}} can be used to leave a worksheet and {{KeyCode|Enter}} to go back in (useful if you have several GeoGebra worksheets on one page)
 
{{KeyCode|Escape}} can be used to leave a worksheet and {{KeyCode|Enter}} to go back in (useful if you have several GeoGebra worksheets on one page)
 +
 +
{{KeyCode|+}} and {{KeyCode|−}} can be used to move a point on a path (eg on a circle)
  
 
GeoGebra Applets are also fully touch-enabled so students can use applets on a special large tablet if necessary.
 
GeoGebra Applets are also fully touch-enabled so students can use applets on a special large tablet if necessary.

Revision as of 11:18, 17 May 2018


When designing applets it is important to allow (as much as possible) for all students to access them.

Fontsize, Color & Contrast

Using large fonts with a good contrast is important. Select a large font-size in Options -> Fontsize before you start designing your applet. You can also use the keyboard shortcut Ctrl + 2 to make all fonts bigger and all lines thicker. Ctrl + 3 will change the default for all new objects to be Black and unfilled.

Ideally use dark colors on a white background and thick lines. Pure Red and Green don't have a very good contrast so you should use some darker versions, eg Blue, Dark Green, Dark Red

If you use colors to distinguish otherwise-similar objects, then consider also using dashed lines for one of them. You can also find websites where you can check whether your color scheme is good, for example http://www.vischeck.com/

Sliders

Make sliders as long as possible so that they are usable by students whose fine motor-skills are less good. Consider adding "decrement" and "increment" Buttons at each end of the slider as well.

Keyboard Shortcuts

Students can use Tab to cycle round the objects in a worksheet you have designed. It is important that you uncheck "Selection Allowed" in Object Properties -> Advanced for the objects you don't want to be selected. There is a keyboard shortcut Ctrl + Shift + D in the desktop version that will toggle this property for objects other than Buttons / Sliders / Checkboxes / Points / Input Boxes.

The arrow keys Left, Right, Up, Down can be used to move Sliders and Points once they are selected.

Space can be used to activate a Button, toggle a Checkbox or start/stop a slider animating

Escape can be used to leave a worksheet and Enter to go back in (useful if you have several GeoGebra worksheets on one page)

+ and can be used to move a point on a path (eg on a circle)

GeoGebra Applets are also fully touch-enabled so students can use applets on a special large tablet if necessary.

Tooltips

You can provide custom tooltips for certain objects by using the Caption property, and changing how the tooltip is shown: https://wiki.geogebra.org/en/Tooltips

Screen Readers

You can have some text attached to the Graphics Views so that it is read by a screen reader.

If you make a text object in GeoGebra called altText, altText2, altText3D then it will be attached to Graphics View 1, Graphics View 2, Graphics View 3D respectively.

© 2024 International GeoGebra Institute