Added an automatically generated study guide

_config.yml

@@ -66,4 +66,5 @@ titles_from_headings:
 header_pages:
   - resources.md
   - syllabus.md
-  - lessons.md
+  - lessons.md
+  - study-guide.md

study-guide.md

@@ -0,0 +1,43 @@
+# Study Guide
+
+<div id="study-guide"></div>
+
+<script>
+  const lessonPages = ['lessons/1.html',
+                       'lessons/2.html',
+                       'lessons/3.html',
+                       'lessons/4.html',
+                       'lessons/5.html',
+                       'lessons/6.html',
+                       'lessons/7.html',
+                       'lessons/8.html',
+                       'lessons/9.html',
+                       'lessons/10.html',
+                       'lessons/11.html',
+                       'lessons/12.html',
+                       'lessons/13.html',
+                       ];
+
+  async function generateStudyGuide() {
+    const studyGuideContainer = document.getElementById('study-guide');
+
+    for (const lessonPath of lessonPages) {
+      try {
+        const response = await fetch(lessonPath);
+        const text = await response.text();
+        const parser = new DOMParser();
+        const doc = parser.parseFromString(text, 'text/html');
+        const studyGuideSection = doc.querySelector('h2#study-guide + ul');
+        if (studyGuideSection) {
+          const lessonNumber = lessonPages.indexOf(lessonPath) + 1;
+          const lessonHeader = `<h3><a href="${lessonPath}">Lesson ${lessonNumber}</a></h3>`;
+          studyGuideContainer.innerHTML += lessonHeader;
+          studyGuideContainer.appendChild(studyGuideSection.cloneNode(true));        }
+        } catch (error) {
+          console.error("Error fetching or parsing lesson:", lessonPath, error);
+        }
+    }
+  }
+
+  generateStudyGuide();
+</script>