diff --git a/1-introduction/index.html b/1-introduction/index.html
index 7d50632..a2c788c 100644
--- a/1-introduction/index.html
+++ b/1-introduction/index.html
@@ -13,7 +13,7 @@
       <a-sphere id="venus" position="-5 2 -10" radius=".5" color="#ECBFBF"></a-sphere>
       <a-sphere id="mars" position="-1 2 -10" radius=".25" color="#CF503A"></a-sphere>
 
-      <!--notice this one doens't have a radius? If you don't specify one,
+      <!--notice this one doesn't have a radius? If you don't specify one,
       A-Frame uses the default, which is 1 -->
       <a-sphere id="jupiter" position="1 2 -10" color="#C9957A"></a-sphere>
       <a-sphere id="pluto" position="13 2 -10" radius=".10" color="#BFCFD4"></a-sphere>
@@ -61,4 +61,4 @@
 
     </a-scene>
   </body> 
-</html>
\ No newline at end of file
+</html>
diff --git a/index.html b/index.html
index be56015..1573f95 100644
--- a/index.html
+++ b/index.html
@@ -13,7 +13,7 @@
       <a-circle id="venus" position="-5 2 -10" radius=".5" color="#ECBFBF"></a-circle>
       <a-circle id="mars" position="-1 2 -10" radius=".25" color="#CF503A"></a-circle>
 
-      <!--notice this one doens't have a radius? If you don't specify one,
+      <!--notice this one doesn't have a radius? If you don't specify one,
       A-Frame uses the default, which is 1 -->
       <a-circle id="jupiter" position="1 2 -10" color="#C9957A"></a-circle>
       <a-circle id="pluto" position="13 2 -10" radius=".10" color="#BFCFD4"></a-circle
@@ -61,4 +61,4 @@
 
     </a-scene>
   </body> 
-</html>
\ No newline at end of file
+</html>