diff --git a/README.md b/README.md
index a3a32bc2..ec9422d0 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
 # learn-js
 JavaScript tutorial repo
 
-### REPLACE WITH YOUR FULL NAME
+### Yuanyuan Yang
diff --git a/quiz/vars1.html b/quiz/vars1.html
index 3e4b0236..7bbe18e6 100644
--- a/quiz/vars1.html
+++ b/quiz/vars1.html
@@ -7,7 +7,7 @@
             {
                 y = y + 1;
                 console.log(x+y);
-                let y = 2;
+                y = 2;
             }
             console.log(x);
             console.log(y);
@@ -17,4 +17,4 @@
     <body>
         <h1> A Web Page </h1>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/quiz/vars2.html b/quiz/vars2.html
index 59895a85..3c8823fb 100644
--- a/quiz/vars2.html
+++ b/quiz/vars2.html
@@ -2,7 +2,7 @@
     <head>
         <script>
             // change the script such that i=0,1,2,3,4 is logged in the console
-            for (var i = 0; i < 5; i++) {
+            for (let i = 0; i < 5; i++) {
                 // setTimeout executes the function after 5 ms
                 setTimeout(function() {
                     console.log(i);
@@ -13,4 +13,4 @@
     <body>
         <h1> A Web Page </h1>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/quiz/vars3.html b/quiz/vars3.html
index 5b2d10dd..59f978a6 100644
--- a/quiz/vars3.html
+++ b/quiz/vars3.html
@@ -5,8 +5,8 @@
             const PI = 3.14159;
             {
                 let radius = 5;
-                let area = PI * radius * radius;
-                PI = 3.0;
+                var area = PI * radius * radius;
+                //PI = 3.0;
             }
             console.log(area);
 
@@ -15,4 +15,4 @@
     <body>
         <h1> A Web Page </h1>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/quiz/where2putjs.html b/quiz/where2putjs.html
index 0dff0b61..29111f82 100644
--- a/quiz/where2putjs.html
+++ b/quiz/where2putjs.html
@@ -4,12 +4,6 @@
     <meta charset="UTF-8">
     <title>Title</title>
     <link rel="stylesheet" href="../css/index.css">
-    <script>
-        document.getElementById("demo").textContent = "A paragraph";
-        function myFunction() {
-            document.getElementById("demo").textContent = "Paragraph changed after click.";
-        }
-    </script>
 </head>
 <body>
 <div id="root">
@@ -17,6 +11,11 @@ <h2>Demo JavaScript in Body</h2>
     <p id="demo"> Placeholder ... </p>
     <button type="button" onclick="myFunction()">Try it</button>
 </div>
-
+<script>
+    document.getElementById("demo").textContent = "A paragraph";
+    function myFunction() {
+        document.getElementById("demo").textContent = "Paragraph changed after click.";
+    }
+</script>
 </body>
-</html>
\ No newline at end of file
+</html>
