update Accessibility section

README.md

@@ -98,7 +98,11 @@ contains values for two types of answers: **correct** and **\_incorrect**. Some
 >>**notFinal** (string): Text that will be displayed when the submitted answer is incorrect while more attempts are permitted. This is optional—if you do not supply it, the **\_incorrect.final** feedback will be shown instead.
 
 ### Accessibility
-**Slider** has been assigned a label using the [aria-label](https://github.com/adaptlearning/adapt_framework/wiki/Aria-Labels) attribute: **ariaRegion**. This label is not a visible element. It is utilized by assistive technology such as screen readers. Should the region's text need to be customised, it can be found within the **globals** object in [*properties.schema*](https://github.com/adaptlearning/adapt-contrib-slider/blob/master/properties.schema).   
+**Slider** has been assigned a descriptive label using the [aria-label](https://github.com/adaptlearning/adapt_framework/wiki/Aria-Labels) attribute: **ariaRegion**.  
+
+When **Slider** is used with Adapt Framework v5.12.0 (or better), it supports announcing the correct/learner answer to screen readers (via an an [ARIA Live Region](https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/ARIA_Live_Regions)) when the Correct Answer button is toggled by the learner. The following attributes are used to provide this functionality: **ariaCorrectAnswer**, **ariaCorrectAnswerRange**, **ariaUserAnswer**.
+
+These ARIA labels are not visible elements; they are used by assistive technology (such as screen readers). Should any of these labels need to be customised or translated, they can be found within the `_globals._components._slider` object in **course.json** (or Project settings > Globals in the Adapt Authoring Tool).  
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 ## Limitations