Update teaching.md

Author: chengjun

_pages/teaching.md

@@ -1,8 +1,8 @@
 ---
 layout: page
 permalink: /teaching/
-title: teaching
-description: Materials for courses you taught. 
+title: Teaching
+description: Kindle the fire in your heart. 
 nav: true
 nav_order: 5
 ---
@@ -50,7 +50,9 @@ I am organizing the [**Tycho Reading Club**](https://search.bilibili.com/all?key
 ![image](https://user-images.githubusercontent.com/543384/147380016-da65a625-6480-47f4-8e27-5034d696f553.png)
 
 <br>
-    
-✏️ [Edit this page](https://github.com/SocratesClub/SocratesClub.github.io/edit/master/_pages/teaching.md)
-
+<a href="https://github.com/SocratesClub/SocratesClub.github.io/edit/master/_pages/teaching.mdd">
+  <img src="https://user-images.githubusercontent.com/543384/192227995-fdb3a693-2f68-4dc4-b9bd-06053066322f.png" width = "800" align="middle" />
+</a>
 <br>
+
+