Clean up typo, slightly better wording (#7)

exercises/README.mdx

@@ -9,10 +9,10 @@ understanding of the primitives that power React Server Components and Actions
 which is the future of React.
 
 <callout-danger>
-	We're using unpublished versions of some react packages for this workshop.
+	We're using unpublished versions of some React packages for this workshop.
 	We'll be dealing with implementation details that are not part of the public
 	React API and could change. But the concepts you're learning (which will be
-	our foucs) will stick around forever.
+	our focus) will stick around forever.
 </callout-danger>
 
 We'll be building this framework without **any build tools**. This means no
@@ -38,7 +38,7 @@ on under the hood.
 
 Because we're working with such primitive APIs, this will be one of the more
 challenging things you've done with React. Keep in mind that frameworks exist
-which enable you to offer an awesome user experience with React. This workshop
+that enable you to offer an awesome user experience with React. This workshop
 is about understanding the primitives that power those frameworks now and in the
 future.
 
@@ -130,10 +130,10 @@ differences is profound.
 As a result of this architecture, no code for that UI needs to be sent to the
 client and the data doesn't even need to be sent to the client either. This
 solves some pretty significant performance and maintainability challenges with
-SPAs or even server rendered apps.
+SPAs or even server-rendered apps.
 
 <callout-info>
-	We'll be building this framework as a SPA which uses RSCs on the server. You
+	We'll be building this framework as a SPA that uses RSCs on the server. You
 	can absolutely enhance this further to support server rendering if you like,
 	but we're going to be skipping that optimization to keep things simple.
 </callout-info>