diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ad7c5ab
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+.DS_Store
+.idea/
+*.iml
+.vscode
+__pycache__
+*pyc
+*.ipynb_checkpoints
\ No newline at end of file
diff --git a/README.md b/README.md
index b247ebf..c12717d 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,8 @@
-# PythonFundamentals.Exercises.Algos
\ No newline at end of file
+# PythonFundamentals.Exercises.Algos
+
+## Binary Search
+
+1. Open module search.py.
+2. Fill in the function "binary_search".
+3. Make sure to include unit tests in test_search.py.
+
diff --git a/search.py b/search.py
new file mode 100644
index 0000000..c8a72f4
--- /dev/null
+++ b/search.py
@@ -0,0 +1,9 @@
+from typing import List, Optional
+import logging
+
+
+def binary_search(list_in: List[int], item: int) -> Optional[int]:
+    """
+    If item exists in list_in, this function returns its position in the list.
+    """
+    pass
diff --git a/test_search.py b/test_search.py
new file mode 100644
index 0000000..0b53ddd
--- /dev/null
+++ b/test_search.py
@@ -0,0 +1,12 @@
+import unittest
+import search
+import logging
+
+logging.basicConfig(level=logging.INFO)
+
+
+class SearchTest(unittest.TestCase):
+
+    def test_binary_search(self):
+        pass
+