diff --git a/src/control-flow/blocks.md b/src/control-flow/blocks.md
index b86a3c40..f09f8bbf 100644
--- a/src/control-flow/blocks.md
+++ b/src/control-flow/blocks.md
@@ -36,3 +36,11 @@ fn main() {
 ```
 
 However if the last expression ends with `;`, then the resulting value and type is `()`.
+
+<details>
+
+Key Points:
+* The point of this slide is to show that blocks have a type and value in Rust. 
+* You can show how the value of the block changes by changing the last line in the block. For instance, adding/removing a semicolon or using a `return`.
+   
+</details>