> For the complete documentation index, see [llms.txt](https://plus-skill.gitbook.io/plus-skill-whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://plus-skill.gitbook.io/plus-skill-whitepaper/technology.md).

# Technology

![](https://lh4.googleusercontent.com/wiYt_PXe4uSFThy7cirDyKisUmokfsGjMYt7_SnixOxBcF1AikrvprHzfmY4LB1eDJ3kZJzWjYHggoGDaJow0fQQZcIcw_S29qHu5dcQdPhirkirf9VNpXLlZ3dDoJLlzYqufLqXOMLC8jG-M7g5nFXMHGQh7X78BKS2zp2rxHd5ZsI6v8oH17bRd8yi5n5e)                **Why polygon?**

Using polygon blockchain increase the flexibility and scalibity, and sovereignty of a blockchain project while still affording the security, interoperability, and structural benefits of the Ethereum blockchain.

* Lesson NFTs are used ERC-1155 
* Character NFTs are used ERC-721
* Tokens PPT & PLS are used ERC-20