diff --git a/.gitignore b/.gitignore
index 4b64bc3..6562291 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 node_modules
 .tmp
 npm-debug.log
+*__pycache__*
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 687866a..512e458 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -20,5 +20,9 @@
   "workbench.activityBar.visible": true,
   "workbench.colorTheme": "Visual Studio Dark",
   "workbench.fontAliasing": "antialiased",
-  "workbench.statusBar.visible": true
+  "workbench.statusBar.visible": true,
+  "python.analysis.extraPaths": [
+    "${workspaceFolder}/src",
+    "./src"
+  ]
 }
\ No newline at end of file
diff --git a/README.md b/README.md
index d867e71..114359d 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ Dieses Problem lösen Sie wie folgt:
     Add changes to git using this command: git add .
     Commit changes using this command: git commit -m "some message"
 
-### Autor
+### Autorin
 
 **Dr. Julia Imlauer**
 
@@ -39,5 +39,5 @@ _Robotikerin | ML-Expertin | AI-Enthusiastin_
 Sehen Sie sich andere Kurse des Autors auf [LinkedIn Learning](https://www.linkedin.com/learning/instructors/julia-imlauer) an.
 
 [0]: # (Replace these placeholder URLs with actual course URLs)
-[lil-course-url]: https://www.linkedin.com/learning/tbd
-[lil-thumbnail-url]: https://media.licdn.com/dms/image/D560DAQHy88_RfLwlJw/learning-public-crop_675_1200/0/1687258117518?e=2147483647&v=beta&t=Dfk6Yk8Uljvd9UtwpxGyhpWhx_UF31ccWdm8XXuCIMI
+[lil-course-url]: https://www.linkedin.com/learning/python-grundkurs-25087490
+[lil-thumbnail-url]: https://media.licdn.com/dms/image/v2/D4E0DAQGVDy6GhNuQrg/learning-public-crop_675_1200/learning-public-crop_675_1200/0/1732613158551?e=2147483647&v=beta&t=5LC7lo-5r3cDZmF-extYK9uspoQn-T692GVco2Na7xM
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..9d00e60
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,36 @@
+[build-system]
+requires = ["setuptools>=42", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "aufgaben_package"
+version = "1.0.0"
+description = "Übung für Tests"
+readme = "README.md"
+requires-python = ">=3.6"
+dependencies = [
+    "pytest==8.3.2"
+]
+license = { text = "LinkedIn Learning Exercise Files License" }
+authors = [
+    { name = "Julia Imlauer", email = "info@linkedinlearning.com" }
+]
+keywords = ["python", "grundkurs", "linkedinlearning"]
+classifiers = [
+    "Programming Language :: Python :: 3",
+    "License :: OSI Approved :: LinkedIn Learning Exercise Files License",
+    "Operating System :: OS Independent"
+]
+
+[project.urls]
+"Homepage" = "https://github.com/LinkedInLearning/python-grundkurs-2685000"
+
+[tool.setuptools.packages.find]
+where = ["src"]
+
+[tool.setuptools]
+license-files = ["LICENSE"]
+
+
+# 'Installation' mittels pyproject.toml
+# pip install . 
\ No newline at end of file
diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 0000000..b893048
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,2 @@
+[pytest]
+pythonpath = src
\ No newline at end of file
diff --git a/src/__init__.py b/src/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/aufgaben_package/__init__.py b/src/aufgaben_package/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/aufgaben_package/personen.py b/src/aufgaben_package/personen.py
new file mode 100644
index 0000000..3f67c9d
--- /dev/null
+++ b/src/aufgaben_package/personen.py
@@ -0,0 +1,7 @@
+class Person:
+    def __init__(self, name, alter):
+        self.name = name
+        self.alter = alter
+
+    def __str__(self):
+        return f"{self.name} ({self.alter})"
\ No newline at end of file
diff --git a/src/aufgaben_package/rechen_operation.py b/src/aufgaben_package/rechen_operation.py
new file mode 100644
index 0000000..fc396d1
--- /dev/null
+++ b/src/aufgaben_package/rechen_operation.py
@@ -0,0 +1,13 @@
+def erhoehe_um_zwei(zahl):
+    return zahl + 2
+
+def multipliziere_mit_drei(zahl):
+    return zahl * 3
+
+def subtrahiere_zehn(zahl):
+    return zahl - 10
+
+def teile_durch_vier(zahl):
+    if zahl % 4 != 0:
+        raise ValueError("Zahl muss durch 4 teilbar sein")
+    return zahl / 4
diff --git a/tests/TESTS_HIER_IMPLEMNTIEREN b/tests/TESTS_HIER_IMPLEMNTIEREN
new file mode 100644
index 0000000..e69de29