update learning materials in readme

README.md

@@ -128,8 +128,10 @@ In this case, no decision could be made as we had no matches — so our route la
 | [Introduction](https://github.com/aurelio-labs/semantic-router/blob/main/docs/00-introduction.ipynb) | Introduction to Semantic Router and static routes |
 | [Dynamic Routes](https://github.com/aurelio-labs/semantic-router/blob/main/docs/02-dynamic-routes.ipynb) | Dynamic routes for parameter generation and functionc calls |
 | [Save/Load Layers](https://github.com/aurelio-labs/semantic-router/blob/main/docs/01-save-load-from-file.ipynb) | How to save and load `RouteLayer` from file |
-| [Local Execution](https://github.com/aurelio-labs/semantic-router/blob/main/docs/05-local-execution.ipynb) | Fully local Semantic Router with dynamic routes — *local models such as Mistral 7B outperform GPT-3.5 in most tests* |
 | [LangChain Integration](https://github.com/aurelio-labs/semantic-router/blob/main/docs/03-basic-langchain-agent.ipynb) | How to integrate Semantic Router with LangChain Agents |
+| [Local Execution](https://github.com/aurelio-labs/semantic-router/blob/main/docs/05-local-execution.ipynb) | Fully local Semantic Router with dynamic routes — *local models such as Mistral 7B outperform GPT-3.5 in most tests* |
+| [Route Optimization](https://github.com/aurelio-labs/semantic-router/blob/main/docs/06-threshold-optimization.ipynb) | How to train route layer thresholds to optimize performance |
+| [Multi-Modal Routes](https://github.com/aurelio-labs/semantic-router/blob/main/docs/07-multi-modal.ipynb) | Using multi-modal routes to identify Shrek vs. not-Shrek pictures |
 
 ### Online Course