Update README.md

README.md

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 🔥Start Here!
 
 # App Development with ChatGPT - 101
-1. Sign up and try ChatGPT with these two URLs: https://chat.openai.com/chat and https://platform.openai.com/playground
-  1. Exercise: Register for a free ChatGPT account today!
-2. ChatGPT was built using Machine Learning models like Transformers, the most downloaded SDK on Github: https://github.com/huggingface/transformers
-  1. Exercise: Register for a free Github account today!
-3. By using ChatGPT and https://Huggingface.co together you can write AI programs very quickly for Streamlit, Gradio, Docker, and HTML5.
-  1. Exercise: Register for a free Huggingface account today!
+1. Sign up and try ChatGPT with these two URLs: https://chat.openai.com/chat and https://platform.openai.com/playground.  __Exercise__: Register for a free ChatGPT account today!
+2. ChatGPT was built using Machine Learning models like Transformers, the most downloaded SDK on Github: https://github.com/huggingface/transformers.  __Exercise__: Register for a free Github account today!
+3. By using ChatGPT and https://Huggingface.co together you can write AI programs very quickly for Streamlit, Gradio, Docker, and HTML5.  __Exercise__: Register for a free Huggingface account today!
 
+__Join__ organization classroom with this link: https://huggingface.co/organizations/DataScienceEngineering/share/GkxeINHFzHQaJyMRsAVoKJZTSyBrUeUYGV to learn more.