update readme

README.md

+# Tutorial Structure
+
+## Worksheets and Material
+
+The tutorials include both, coding exercises and calculations done by hand.
+
+There's a worksheet (`sheet-0X.pdf`) for every tutorial in `tutorial-X/worksheet`.
+
+If the tutorial includes coding exercises (some tutorials have no coding exercises),
+there are `jupyter notebooks` (`tutorial-X-task-Y.ipynb`) and data sources provided in `tutorial-X/notebooks`.
+
+## Solutions
+
+Solutions for coding exercises and calculations by hand are also included in the repository.
+
+* See `tutorial-X/notebooks/tutorial-X-task-Y-solution.ipynb` for solutions to coding exercises.
+
+* See `tutorial-X/worksheet/solution-0X.pdf` for solutions to calculations done by hand.
+
+You may refer to them at any time, but (needless to say) it is best if you try without first.
+
 # Python Tutorials
 
 In the tutorials we will repeatedly work with the programming language Python. If you are unfamiliar with the language, you might find the following tutorials useful.
@@ -37,8 +58,6 @@ https://git.scc.kit.edu/sp2668/esm_tutorials/-/archive/master/esm_tutorials-mast
 **If you happen to come across this before the tutorials start,
 you may already want to follow the installation instructions already to get started right away.**
 
-We'll be using `Python` in the tutorials. If you are unfamiliar with `Python`, [this](http://introtopython.org/) is a great start, but a quick Google search on `Python` tutorials will give you millions of great alternatives.
-
 We recommend using the package manager and environment management system `conda` to install the packages we need.
 
 Install [`miniconda`](https://conda.io/docs/user-guide/install/index.html) (or Anaconda). For instructions for your operating system
@@ -48,13 +67,13 @@ Create a new `conda` environment from the provided `environment.yaml` file with
 
 Windows:
 ```bash
-conda env create -f requirements.yml
+conda env create -f environment.yaml
 activate esm-tutorials
 ```
 
 macOS and Linux:
 ```bash
-conda env create -f requirements.yml
+conda env create -f environment.yaml
 conda activate esm-tutorials
 ```
 
@@ -84,4 +103,4 @@ cd esm-tutorials
 jupyter notebook
 ```
 
-You should now be ready to do the tutorials :)
+You should now be ready to do the tutorials :)
\ No newline at end of file