diff --git a/slides/plain-language.html b/slides/plain-language.html
index b251ab96498b05398bd2dfddc6eeb4973440a40d..695d57f303e42b882da0780904c1beedf92c6b47 100644
--- a/slides/plain-language.html
+++ b/slides/plain-language.html
@@ -31,6 +31,25 @@ class:
 - Understanding how to apply plain language guidelines
 - Understanding when to apply plain language guidelines
 
+---
+# Why Plain Language
+
+Helps make text accessible to the non-scientific public (including disabled people). 
+- Important when you do research about people with disabilities
+- Helps make sure that study participants or other interested parties can learn about your research
+- The  Plain Writing Act of, described on [plainlanguage.gov](https://www.plainlanguage.gov/law/), "requires federal agencies use clear government communication that the public can understand and use."
+
+---
+# Why Plain Language
+
+Helps make text accessible to the non-scientific public (including disabled people). 
+
+Can also directly help someone with an intellectual disability. 
+- [WCAG guidelines](https://www.w3.org/WAI/GL/WCAG3/2021/how-tos/clear-words/) state that plain language also "benefit individuals who live with cognitive and learning disabilities, language impairments, memory impairments, and autism." 
+
+--
+Somewhat different requirements for these different audiences
+
 ---
 
 # Plain Language Guidelines 
@@ -114,3 +133,16 @@ We are asking you to focus on this subset
 # Plain Language Resources
 - If you have any questions or want examples about any of these concepts, you can look at the [PlainLanguage.gov website](https://www.plainlanguage.gov/guidelines/).
 
+
+---
+# Assignment
+
+You get to choose what to apply this to and when
+- Can be part of an existing class assignment
+- Can be a response to a reading question
+- Can be other writing you are doing
+- Can be the text of video you are making for some reason
+
+Important to keep it short and be specific about your audience. This is *very hard* to do right. Keep it very short to make that more feasible. 
+
+---