# ML crash course - Neural networks > Machine learning crash course 중 Neural network 챕터. [Machine learning crash course](https://wiki.g15e.com/pages/Machine%20learning%20crash%20course.txt) 중 [Neural network](https://wiki.g15e.com/pages/Artificial%20neural%20network.txt) 챕터. https://developers.google.com/machine-learning/crash-course/neural-networks ## Introduction ## Nodes and hidden layers ### Adding layers to the network ## Activation functions ### Common activation functions ### Other activation functions ### Summary ## Training using backpropagation ### Best practices for neural network training ### Dropout Regularization ## Interactive exercises https://developers.google.com/machine-learning/crash-course/neural-networks/interactive-exercises ## Multi-class classification ### One versus all ### One versus one (softmax) ## What's next - [ML crash course - Embeddings](https://wiki.g15e.com/pages/ML%20crash%20course%20-%20Embeddings.txt)