diff --git a/techniques/aria/ARIA9.html b/techniques/aria/ARIA9.html
index 8e4c42601f..6bcae65398 100644
--- a/techniques/aria/ARIA9.html
+++ b/techniques/aria/ARIA9.html
@@ -59,7 +59,7 @@ <h3>A conference workshop booking table</h3>
 &lt;table&gt;
   &lt;caption&gt;Dinosaur Conference workshop booking table&lt;/caption&gt;
   &lt;tr&gt;
-    &lt;td rowspan="2"&gt;&lt;/td&gt;
+    &lt;th rowspan="2" scope="col"&gt;Track&lt;/th&gt;
     &lt;th colspan="2" scope="colgroup"&gt;Thursday&lt;/th&gt;
     &lt;th colspan="2" scope="colgroup"&gt;Friday&lt;/th&gt;
   &lt;/tr&gt;
@@ -70,7 +70,7 @@ <h3>A conference workshop booking table</h3>
     &lt;th scope="col" id="pm2"&gt;2 to 5 PM&lt;/th&gt;
   &lt;/tr&gt;
   &lt;tr&gt;
-    &lt;th id="track1" scope="row"&gt;track 1&lt;/th&gt;
+    &lt;th id="track1" scope="row"&gt;Track 1&lt;/th&gt;
     &lt;td&gt;
       &lt;h2 id="title-TM1"&gt;The Paleozoic era &lt;/h2&gt;
       &lt;p&gt;2 places left&lt;/p&gt;
@@ -97,7 +97,7 @@ <h3>A conference workshop booking table</h3>
     &lt;/td&gt;
   &lt;/tr&gt;
   &lt;tr&gt;
-    &lt;th id="track2" scope="row"&gt;track 2&lt;/th&gt;
+    &lt;th id="track2" scope="row"&gt;Track 2&lt;/th&gt;
     &lt;td&gt;
       &lt;h2 id="title-TM2"&gt;The Cretaceous period&lt;/h2&gt;
       &lt;p&gt;18 places left&lt;/p&gt;
diff --git a/working-examples/aria-alert-identify-errors/index.html b/working-examples/aria-alert-identify-errors/index.html
index ea01f5d6c3..8a8bd92df3 100644
--- a/working-examples/aria-alert-identify-errors/index.html
+++ b/working-examples/aria-alert-identify-errors/index.html
@@ -1,9 +1,28 @@
 <!doctype html>
-<html>
+<html lang="en">
 <head>
 <meta charset="UTF-8">
-<title>Using role=alert to Identify Errors</title>
-<script src="http://code.jquery.com/jquery.js"></script>
+<title>Using ARIA live regions or role=alert to identify errors</title>
+<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+<style>
+	body{
+		background:#fff;
+		color:#000;
+		font-family:system-ui;
+	}
+
+	input{
+		border:1px solid #000;
+		font:inherit;
+	}
+
+	[type=submit]{
+		background: #666;
+		color:#fff;
+	}
+</style>
+<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script>
+
 <script>
 $(document).ready(function(e) {
 	$('#signup').submit(function() {
@@ -50,7 +69,7 @@
 </head>
 
 <body>
-<h1>Using ARIA Live Regions or role=alert to Identify Errors</h1>
+<h1>Using ARIA live regions or <code class="language-html">role=alert</code> to identify errors</h1>
 <form name="signup" id="signup" method="post" action="">
   <p id="errors" role="alert" aria-atomic="true"></p>
   <p>
diff --git a/working-examples/aria-labelledby-time-out-input-concatenated-label/index.html b/working-examples/aria-labelledby-time-out-input-concatenated-label/index.html
index 3a44053be0..a8fa8223b7 100644
--- a/working-examples/aria-labelledby-time-out-input-concatenated-label/index.html
+++ b/working-examples/aria-labelledby-time-out-input-concatenated-label/index.html
@@ -1,14 +1,20 @@
 <!DOCTYPE html>
 <html lang="en">
 <head>
-<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
-<title>aria-labelledby example 1:  Extend time-out</title>	
-
+<meta content="charset=UTF-8">
+<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+<title>aria-labelledby example 1: Extend time-out</title>
+<style>
+    body{
+        background:#fff;
+        color:#000;
+        font-family: system-ui;
+    }
+</style>
 </head>
-
 <body>
 
-<h2>Extend timeout</h2>
+<h1><code class="language-html">aria-labelledby</code> example 1: Extend time-out</h1>
 
 <form>
 <p><span id="timeout-label"><label for="timeout-duration">Extend time-out to</label></span>
@@ -18,6 +24,6 @@ <h2>Extend timeout</h2>
 </form>
 
 
-<p>(Adapted from <a href="http://www.marcozehe.de/2008/03/23/easy-aria-tip-2-aria-labelledby-and-aria-described">Easy ARIA tip #2: aria-labelledby and aria-describedby</a>, an example put together by Marco Zehe in 2008)</p>
+<p>(Adapted from <a href="https://www.marcozehe.de/easy-aria-tip-2-aria-labelledby-and-aria-describedby/">Easy ARIA tip #2: aria-labelledby and aria-describedby</a>, an example put together by Marco Zehe in 2008)</p>
 </body>
 </html>
diff --git a/working-examples/aria-labelledby-workshop-booking-timetable/index.html b/working-examples/aria-labelledby-workshop-booking-timetable/index.html
index a85b7a354d..2635f96d7c 100644
--- a/working-examples/aria-labelledby-workshop-booking-timetable/index.html
+++ b/working-examples/aria-labelledby-workshop-booking-timetable/index.html
@@ -1,10 +1,31 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
-<html xmlns="http://www.w3.org/1999/xhtml">
+<!DOCTYPE html>
+<html lang="en">
 <head>
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
+<meta charset="utf-8"/>
 <title>Dinosaur conference</title>
-</head>
+<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+
+<style>
+	body{
+		background:#fff;
+		color:#000;
+		font:1rem / 1.5 system-ui;
+	}
 
+	table{
+		border:1px solid hsl(0, 0%, 0%);
+		border-collapse:collapse;
+		margin-block-end:1rem;
+	}
+	th, td{
+		border:1px solid;
+	}
+
+	input[type=submit]{
+		font:inherit;
+	}
+</style>
+</head>
 <body>
 <h1>Dinosaur conference workshops timetable Thursday, 14.  & Friday, 15. March 2013</h1>
 
@@ -13,7 +34,7 @@ <h1>Dinosaur conference workshops timetable Thursday, 14.  & Friday, 15. March 2
 Dinosaur conference workshop booking table
 </caption>
 <tr>
-	<td rowspan="2"></td>
+	<th rowspan="2" scope="col">Track</th>
 	<th colspan="2" scope="colgroup">Thursday</th>
 	<th colspan="2" scope="colgroup">Friday</th>
 </tr>
@@ -26,12 +47,12 @@ <h1>Dinosaur conference workshops timetable Thursday, 14.  & Friday, 15. March 2
 </tr>
 
 <tr>
-	<th id="track1" scope="row">track 1</th>
+	<th id="track1" scope="row">Track 1</th>
 	<td>
-		<h2 id="title-TM1">The Paleozoic era </h2>
+		<h2 id="title-TM1">The Paleozoic era</h2>
 		<p>2 places left</p>
 		<p><input type="checkbox" id="TM1" aria-labelledby="title-TM1 track1 am1 TM1-att">
-                <label id="TM1-att" for="TM1">Attend</label></p>
+			<label id="TM1-att" for="TM1">Attend</label></p>
 	</td>
 	
 	<td>
@@ -59,7 +80,7 @@ <h2 id="title-FA1">The Jurassic period</h2>
 
 
 <tr>
-	<th id="track2" scope="row">track 2</th>
+	<th id="track2" scope="row">Track 2</th>
 	<td>
 		<h2 id="title-TM2">The Cretaceous period</h2>
 		<p>18 places left</p>
@@ -89,8 +110,7 @@ <h2 id="title-FA2">Emerging scholarship </h2>
 	</td>
 </tr>
 </table>
-<p>&nbsp;</p>
-<table role="presentation" cellspacing="0" cellpadding="4" border="0">
+<table role="presentation" cellspacing="0" cellpadding="4">
 <tr>
 <td><label for="123">Maiden Name:</label></td>
 <td>
@@ -98,7 +118,6 @@ <h2 id="title-FA2">Emerging scholarship </h2>
   <span id="986">(Only enter if different from last name) </span>
 </td>
 </table>
-<p>&nbsp;</p>
 <input type="submit" value="Log in">
 </body>
 </html>
diff --git a/working-examples/device-motion-sensor-input-failure/index.html b/working-examples/device-motion-sensor-input-failure/index.html
index cc80d6cb05..30ae2747d0 100644
--- a/working-examples/device-motion-sensor-input-failure/index.html
+++ b/working-examples/device-motion-sensor-input-failure/index.html
@@ -1,11 +1,22 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
 <head>
-<style type="text/css">
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+  <style>
+    body{
+      background: #fff;
+      color:#000;
+      font-family:system-ui;
+    }
 
-.slidecontainer {
-  width:100%;
-}
+    button{
+      font:inherit;
+    }
+
+  .slidecontainer {
+    width:100%;
+  }
 </style>
 
 <title>WCAG Failure Example of Motion Sensor</title> 
@@ -14,14 +25,14 @@
 
 <pre class="output"></pre>
 
-  <h1>Slider Motion Sensor Failure Example </h1>
+  <h1>Slider Motion Sensor Failure Example</h1>
 
  <p>Open this slider on a device with a motion sensor, such as a smart phone or tablet. Tilt the device to the right and left to adjust the slider value. The decrease and increase buttons also adjust the value. There is no way to deactivate the motion sensor. </p>
  <p>Note: This example may not work across all browsers.</p>
   
 <div class="slidecontainer">
 <button type="button" name="decrease" onclick="decreaseFunction()">Decrease Value</button>
-<input type="range" min="1" max="100" value="50" class="slider" id="motionSlider">
+<input aria-label="demo slider" type="range" min="1" max="100" value="50" class="slider" id="motionSlider">
 <button type="button" name="increase" onclick="increaseFunction()">Increase Value</button>
 <p aria-live="polite">Slider Value: <span id="demo"></span></p>
 </div>
diff --git a/working-examples/device-motion-sensor-input/index.html b/working-examples/device-motion-sensor-input/index.html
index ac13e13316..6370ff9e39 100644
--- a/working-examples/device-motion-sensor-input/index.html
+++ b/working-examples/device-motion-sensor-input/index.html
@@ -1,11 +1,21 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
 <head>
-<style type="text/css">
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+  <style>
+    body{
+      background: #fff;
+      color:#000;
+      font-family:system-ui;
+    }
 
-.slidecontainer {
+    button{
+      font:inherit;
+    }
+  .slidecontainer {
   width:100%;
-}
+  }
 </style>
 
 <title>WCAG Example of Motion Sensor</title> 
@@ -14,14 +24,14 @@
 
 <pre class="output"></pre>
 
-  <h1>Slider Motion Sensor Example </h1>
+  <h1>Slider Motion Sensor Example</h1>
 
  <p>Open this slider on a device with a motion sensor, such as a smart phone or tablet. Tilt the device to the right and left to adjust the slider value. The decrease and increase buttons also adjust the value.  The check box disables the motion sensing adjustment.</p>
  <p>Note: This example may not work across all browsers.</p>
   
 <div class="slidecontainer">
 <button type="button" name="decrease" onclick="decreaseFunction()">Decrease Value</button>
-<input type="range" min="1" max="100" value="50" class="slider" id="motionSlider">
+<input aria-label="demo slider" type="range" min="1" max="100" value="50" class="slider" id="motionSlider">
 <button type="button" name="increase" onclick="increaseFunction()">Increase Value</button>
 <p aria-live="polite">Slider Value: <span id="demo"></span></p>
 </div>
