- fixed spelling mistakes

README.md

@@ -3,14 +3,16 @@
 Understanding the basic concepts of an ethernet switch can be challenging in the beginning. All the new technical terms, IEEE industry standards names and CLI configuration can easily overwhelm a young networker. 
 
 This application is a draft for a concept where the user learns how a switch works by making the switching decisions himself. 
-The user is prompted one ethernet frame after another. For each those he decides on which ports the frames should be sent. He learns by try-and-error. When he reaches a 100% success rate, he’s able to “think like a switch”. 
+The user is prompted one ethernet frame after another. For each of those he decides on which ports the frames should be sent. He learns by try-and-error. When he reaches a 100% success rate, he’s able to “think like a switch”. 
+
+This currently available version focuses on VLANs and is shipped as a Windows WPF application. Long term goal is to develop a lightweight WebApp. 
 
-This current available version focuses on VLANs and is shipped as a Windows WPF application. Long term goal is to develop a lightweight WebApp. 
 Feel free to use this application for your class or self-studying.
+
 Feedback is welcome!  
 
 # About me
 
 I'm a young teacher and I like to develop learning tools in my free time for my students. Any support is highly appreciated. 
 
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+<a href="https://www.buymeacoffee.com/muqiuq" target="_blank"><img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Buy Me A Coffee" style="height: 30px !important;width: 108px !important;" width="200"></a>