diff --git a/Sprint-2/improve_with_caches/fibonacci/fibonacci.py b/Sprint-2/improve_with_caches/fibonacci/fibonacci.py
index 60cc6671..27617629 100644
--- a/Sprint-2/improve_with_caches/fibonacci/fibonacci.py
+++ b/Sprint-2/improve_with_caches/fibonacci/fibonacci.py
@@ -1,4 +1,13 @@
+cache = {
+    0: 0,
+    1: 1
+}
+
 def fibonacci(n):
+    if n in cache:
+        return cache[n]
     if n <= 1:
         return n
-    return fibonacci(n - 1) + fibonacci(n - 2)
+    result = fibonacci(n - 1) + fibonacci(n - 2)
+    cache[n] = result
+    return result
diff --git a/Sprint-2/improve_with_caches/making_change/making_change.py b/Sprint-2/improve_with_caches/making_change/making_change.py
index 255612e5..7488c933 100644
--- a/Sprint-2/improve_with_caches/making_change/making_change.py
+++ b/Sprint-2/improve_with_caches/making_change/making_change.py
@@ -1,5 +1,6 @@
 from typing import List
-
+cache = {}
+all_coins = [200, 100, 50, 20, 10, 5, 2, 1]
 
 def ways_to_make_change(total: int) -> int:
     """
@@ -7,26 +8,38 @@ def ways_to_make_change(total: int) -> int:
 
     For instance, there are two ways to make a value of 3: with 3x 1 coins, or with 1x 1 coin and 1x 2 coin.
     """
-    return ways_to_make_change_helper(total, [200, 100, 50, 20, 10, 5, 2, 1])
-
+    return ways_to_make_change_helper(total, 0)
 
-def ways_to_make_change_helper(total: int, coins: List[int]) -> int:
+def ways_to_make_change_helper(total: int,  start_index: int) -> int:
     """
     Helper function for ways_to_make_change to avoid exposing the coins parameter to callers.
     """
-    if total == 0 or len(coins) == 0:
-        return 0
+    key = (total, start_index)
 
+    if key in cache:
+        return cache[key]
+    
+    if total == 0:
+        return 1
+
+    if start_index >= len(all_coins):
+        return 0
+    
     ways = 0
-    for coin_index in range(len(coins)):
-        coin = coins[coin_index]
+    for coin_index in range(start_index, len(all_coins)):
+        coin = all_coins[coin_index]
         count_of_coin = 1
         while coin * count_of_coin <= total:
             total_from_coins = coin * count_of_coin
             if total_from_coins == total:
                 ways += 1
             else:
-                intermediate = ways_to_make_change_helper(total - total_from_coins, coins=coins[coin_index+1:])
-                ways += intermediate
+               intermediate = ways_to_make_change_helper(
+                    total - total_from_coins,
+                    coin_index + 1
+                )
+               ways += intermediate
+
             count_of_coin += 1
+    cache[key] = ways
     return ways