This dapp is a developed using solidity smart contract framework Truffle.This application basically enables decentralized grading system any blocks you add will conflict with existing ones, and the other nodes will automatically reject your alterations such as increasing or decreasing marks of a student will be visible to everyone who took the course .This increases trust, security, transparency, and the traceability of data shared across a grading network
You can browse the code on the GitHub page, submit patches and pull requests! Your help would be greatly appreciated ;-)