diff --git a/lessons/restquicktips.html b/lessons/restquicktips.html
index b413165..2e03392 100644
--- a/lessons/restquicktips.html
+++ b/lessons/restquicktips.html
@@ -73,7 +73,7 @@
                         <dt>GET</dt>
                             <dd>Read a specific resource (by an identifier) or a collection of resources.</dd>
                         <dt>PUT</dt>
-                            <dd>Update a specific resource (by an identifier) or a collection of resources. Can also be used to create a specific resource if the resource identifier is know before-hand.</dd>
+                            <dd>Update a specific resource (by an identifier) or a collection of resources. Can also be used to create a specific resource if the resource identifier is known before-hand.</dd>
                         <dt>DELETE</dt>
                             <dd>Remove/delete a specific resource by an identifier.</dd>
                         <dt>POST</dt>