diff --git a/cs171/Lect03/hello.py b/cs171/Lect03/hello.py
index 380903bae249f3ee98a3a271713a82f09dd30752..061448a8d1383c3b10b99d3b4667be38bd953c3a 100644
--- a/cs171/Lect03/hello.py
+++ b/cs171/Lect03/hello.py
@@ -1,62 +1 @@
-print("Hello Lecture 3!")
-
-name = "Moix"
-longer = "This is a longer string of text"
-         #0123456789012345678901234567890
-
-print(name)
-
-print(len(name))
-print(len("A literal string"))
-
-print(name[1:3])
-print(longer[ 1 : 10 : 2 ])
-print(len(longer[ 1 : 10 : 2 ]))
-
-print(3 + 2)
-print("three" + "two")
-print(str(1) + "three")
-
-digits = 98.6
-
-print(float(int(float("99789.87"))))
-
-print(int(digits))
-print(digits)
-
-print(float("3e8"))
-
-print(ord('🐉'))
-print(chr(128009 + 1))
-
-print("She called him \"interesting\" the other day")
-print('She called him "interesting" the other day')
-print("Isn't is a \"contraction\"")
-print("A\nB")
-
-price = 5
-item = "coffee"
-
-print(item + ":\t" + str(price))
-print("coffee:\t%.2f" % price)
-print(f"{item}:\t{price:.2f}")
-
-names = ["you", "Carol", "Bob"]
-names[0] = "anthony"
-print(names.index("Bob"))
-
-
-
-print([f"{i} squared is {i**2}" for i in range(1, 10)])
-
-
-set1 = {"A", "B", "C"}
-set2 = {"C", "A", "B", 7}
-
-print(set1)
-print(set2)
-
-print(set1 == set2)
-
-print(7 in set1)
-print(7 in set2)
\ No newline at end of file
+print("Hello CS 171")
diff --git a/cs171/Lect05/hello.py b/cs171/Lect05/hello.py
index ed48d0be89109bad5a460fac5b023cfb8e325254..061448a8d1383c3b10b99d3b4667be38bd953c3a 100644
--- a/cs171/Lect05/hello.py
+++ b/cs171/Lect05/hello.py
@@ -1,13 +1 @@
-
-lecture = 5
-
-while lecture <= 10:
-    # print(f"Hello Lecture {lecture}!")
-    lecture = lecture - 1
-    
-print("I am done. Finished at lecture", lecture)
-
-#     
-# if lecture <= 10:
-#     print(f"Hello Lecture {lecture}!")
-#     lecture = lecture + 1
\ No newline at end of file
+print("Hello CS 171")
diff --git a/cs172/Lect08/hello.py b/cs171/hello.py
similarity index 100%
rename from cs172/Lect08/hello.py
rename to cs171/hello.py
diff --git a/cs171/lect01/hello.py b/cs171/lect01/hello.py
new file mode 100644
index 0000000000000000000000000000000000000000..061448a8d1383c3b10b99d3b4667be38bd953c3a
--- /dev/null
+++ b/cs171/lect01/hello.py
@@ -0,0 +1 @@
+print("Hello CS 171")
diff --git a/cs171/lect02/hello.py b/cs171/lect02/hello.py
new file mode 100644
index 0000000000000000000000000000000000000000..061448a8d1383c3b10b99d3b4667be38bd953c3a
--- /dev/null
+++ b/cs171/lect02/hello.py
@@ -0,0 +1 @@
+print("Hello CS 171")
diff --git a/cs171/lect04/hello.py b/cs171/lect04/hello.py
new file mode 100644
index 0000000000000000000000000000000000000000..061448a8d1383c3b10b99d3b4667be38bd953c3a
--- /dev/null
+++ b/cs171/lect04/hello.py
@@ -0,0 +1 @@
+print("Hello CS 171")
diff --git a/cs171/Lect01/age_demo.py b/previous/cs171/Lect01/age_demo.py
similarity index 100%
rename from cs171/Lect01/age_demo.py
rename to previous/cs171/Lect01/age_demo.py
diff --git a/cs171/Lect01/change.py b/previous/cs171/Lect01/change.py
similarity index 100%
rename from cs171/Lect01/change.py
rename to previous/cs171/Lect01/change.py
diff --git a/cs171/Lect01/concat.py b/previous/cs171/Lect01/concat.py
similarity index 100%
rename from cs171/Lect01/concat.py
rename to previous/cs171/Lect01/concat.py
diff --git a/cs171/Lect01/hellocs171.py b/previous/cs171/Lect01/hellocs171.py
similarity index 100%
rename from cs171/Lect01/hellocs171.py
rename to previous/cs171/Lect01/hellocs171.py
diff --git a/cs171/Lect01/inputexample.py b/previous/cs171/Lect01/inputexample.py
similarity index 100%
rename from cs171/Lect01/inputexample.py
rename to previous/cs171/Lect01/inputexample.py
diff --git a/cs171/Lect01/mathdemo.py b/previous/cs171/Lect01/mathdemo.py
similarity index 100%
rename from cs171/Lect01/mathdemo.py
rename to previous/cs171/Lect01/mathdemo.py
diff --git a/cs171/Lect01/printmultiple.py b/previous/cs171/Lect01/printmultiple.py
similarity index 100%
rename from cs171/Lect01/printmultiple.py
rename to previous/cs171/Lect01/printmultiple.py
diff --git a/cs171/Lect02/readme.txt b/previous/cs171/Lect02/readme.txt
similarity index 100%
rename from cs171/Lect02/readme.txt
rename to previous/cs171/Lect02/readme.txt
diff --git a/cs171/Lect03/LectureProblems.py b/previous/cs171/Lect03/LectureProblems.py
similarity index 100%
rename from cs171/Lect03/LectureProblems.py
rename to previous/cs171/Lect03/LectureProblems.py
diff --git a/cs171/Lect03/grades.py b/previous/cs171/Lect03/grades.py
similarity index 100%
rename from cs171/Lect03/grades.py
rename to previous/cs171/Lect03/grades.py
diff --git a/previous/cs171/Lect03/hello.py b/previous/cs171/Lect03/hello.py
new file mode 100644
index 0000000000000000000000000000000000000000..380903bae249f3ee98a3a271713a82f09dd30752
--- /dev/null
+++ b/previous/cs171/Lect03/hello.py
@@ -0,0 +1,62 @@
+print("Hello Lecture 3!")
+
+name = "Moix"
+longer = "This is a longer string of text"
+         #0123456789012345678901234567890
+
+print(name)
+
+print(len(name))
+print(len("A literal string"))
+
+print(name[1:3])
+print(longer[ 1 : 10 : 2 ])
+print(len(longer[ 1 : 10 : 2 ]))
+
+print(3 + 2)
+print("three" + "two")
+print(str(1) + "three")
+
+digits = 98.6
+
+print(float(int(float("99789.87"))))
+
+print(int(digits))
+print(digits)
+
+print(float("3e8"))
+
+print(ord('🐉'))
+print(chr(128009 + 1))
+
+print("She called him \"interesting\" the other day")
+print('She called him "interesting" the other day')
+print("Isn't is a \"contraction\"")
+print("A\nB")
+
+price = 5
+item = "coffee"
+
+print(item + ":\t" + str(price))
+print("coffee:\t%.2f" % price)
+print(f"{item}:\t{price:.2f}")
+
+names = ["you", "Carol", "Bob"]
+names[0] = "anthony"
+print(names.index("Bob"))
+
+
+
+print([f"{i} squared is {i**2}" for i in range(1, 10)])
+
+
+set1 = {"A", "B", "C"}
+set2 = {"C", "A", "B", 7}
+
+print(set1)
+print(set2)
+
+print(set1 == set2)
+
+print(7 in set1)
+print(7 in set2)
\ No newline at end of file
diff --git a/cs171/Lect03/states.py b/previous/cs171/Lect03/states.py
similarity index 100%
rename from cs171/Lect03/states.py
rename to previous/cs171/Lect03/states.py
diff --git a/cs171/Lect04/bmi.py b/previous/cs171/Lect04/bmi.py
similarity index 100%
rename from cs171/Lect04/bmi.py
rename to previous/cs171/Lect04/bmi.py
diff --git a/cs171/Lect04/hello4.py b/previous/cs171/Lect04/hello4.py
similarity index 100%
rename from cs171/Lect04/hello4.py
rename to previous/cs171/Lect04/hello4.py
diff --git a/cs171/Lect04/myGrade.py b/previous/cs171/Lect04/myGrade.py
similarity index 100%
rename from cs171/Lect04/myGrade.py
rename to previous/cs171/Lect04/myGrade.py
diff --git a/cs171/Lect05/addodds.py b/previous/cs171/Lect05/addodds.py
similarity index 100%
rename from cs171/Lect05/addodds.py
rename to previous/cs171/Lect05/addodds.py
diff --git a/cs171/Lect05/for_range.py b/previous/cs171/Lect05/for_range.py
similarity index 100%
rename from cs171/Lect05/for_range.py
rename to previous/cs171/Lect05/for_range.py
diff --git a/cs171/Lect05/hangman.py b/previous/cs171/Lect05/hangman.py
similarity index 100%
rename from cs171/Lect05/hangman.py
rename to previous/cs171/Lect05/hangman.py
diff --git a/previous/cs171/Lect05/hello.py b/previous/cs171/Lect05/hello.py
new file mode 100644
index 0000000000000000000000000000000000000000..ed48d0be89109bad5a460fac5b023cfb8e325254
--- /dev/null
+++ b/previous/cs171/Lect05/hello.py
@@ -0,0 +1,13 @@
+
+lecture = 5
+
+while lecture <= 10:
+    # print(f"Hello Lecture {lecture}!")
+    lecture = lecture - 1
+    
+print("I am done. Finished at lecture", lecture)
+
+#     
+# if lecture <= 10:
+#     print(f"Hello Lecture {lecture}!")
+#     lecture = lecture + 1
\ No newline at end of file
diff --git a/cs171/Lect05/set_iteration.py b/previous/cs171/Lect05/set_iteration.py
similarity index 100%
rename from cs171/Lect05/set_iteration.py
rename to previous/cs171/Lect05/set_iteration.py
diff --git a/cs171/Lect05/stairs.py b/previous/cs171/Lect05/stairs.py
similarity index 100%
rename from cs171/Lect05/stairs.py
rename to previous/cs171/Lect05/stairs.py
diff --git a/cs171/Lect06/counting.py b/previous/cs171/Lect06/counting.py
similarity index 100%
rename from cs171/Lect06/counting.py
rename to previous/cs171/Lect06/counting.py
diff --git a/cs171/Lect06/hello.py b/previous/cs171/Lect06/hello.py
similarity index 100%
rename from cs171/Lect06/hello.py
rename to previous/cs171/Lect06/hello.py
diff --git a/cs171/Lect06/import.py b/previous/cs171/Lect06/import.py
similarity index 100%
rename from cs171/Lect06/import.py
rename to previous/cs171/Lect06/import.py
diff --git a/cs171/Lect06/nested.py b/previous/cs171/Lect06/nested.py
similarity index 100%
rename from cs171/Lect06/nested.py
rename to previous/cs171/Lect06/nested.py
diff --git a/cs171/Lect06/scope.py b/previous/cs171/Lect06/scope.py
similarity index 100%
rename from cs171/Lect06/scope.py
rename to previous/cs171/Lect06/scope.py
diff --git a/cs171/Lect06/swap.py b/previous/cs171/Lect06/swap.py
similarity index 100%
rename from cs171/Lect06/swap.py
rename to previous/cs171/Lect06/swap.py
diff --git a/cs171/Lect08/fibo.py b/previous/cs171/Lect08/fibo.py
similarity index 100%
rename from cs171/Lect08/fibo.py
rename to previous/cs171/Lect08/fibo.py
diff --git a/cs171/Lect08/fibo_iterative.py b/previous/cs171/Lect08/fibo_iterative.py
similarity index 100%
rename from cs171/Lect08/fibo_iterative.py
rename to previous/cs171/Lect08/fibo_iterative.py
diff --git a/cs171/Lect08/hello.py b/previous/cs171/Lect08/hello.py
similarity index 100%
rename from cs171/Lect08/hello.py
rename to previous/cs171/Lect08/hello.py
diff --git a/cs171/Lect08/readme.py b/previous/cs171/Lect08/readme.py
similarity index 100%
rename from cs171/Lect08/readme.py
rename to previous/cs171/Lect08/readme.py
diff --git a/cs171/Lect08/sumOfDigits.py b/previous/cs171/Lect08/sumOfDigits.py
similarity index 100%
rename from cs171/Lect08/sumOfDigits.py
rename to previous/cs171/Lect08/sumOfDigits.py
diff --git a/cs171/Lect08/summation.py b/previous/cs171/Lect08/summation.py
similarity index 100%
rename from cs171/Lect08/summation.py
rename to previous/cs171/Lect08/summation.py
diff --git a/cs171/Lect09/hello.py b/previous/cs171/Lect09/hello.py
similarity index 100%
rename from cs171/Lect09/hello.py
rename to previous/cs171/Lect09/hello.py
diff --git a/cs172/Lect01/broken_demo.py b/previous/cs172/Lect01/broken_demo.py
similarity index 100%
rename from cs172/Lect01/broken_demo.py
rename to previous/cs172/Lect01/broken_demo.py
diff --git a/cs172/Lect01/module.py b/previous/cs172/Lect01/module.py
similarity index 100%
rename from cs172/Lect01/module.py
rename to previous/cs172/Lect01/module.py
diff --git a/cs172/Lect01/notModule.py b/previous/cs172/Lect01/notModule.py
similarity index 100%
rename from cs172/Lect01/notModule.py
rename to previous/cs172/Lect01/notModule.py
diff --git a/cs172/Lect01/pringle.py b/previous/cs172/Lect01/pringle.py
similarity index 100%
rename from cs172/Lect01/pringle.py
rename to previous/cs172/Lect01/pringle.py
diff --git a/cs172/Lect01/script.py b/previous/cs172/Lect01/script.py
similarity index 100%
rename from cs172/Lect01/script.py
rename to previous/cs172/Lect01/script.py
diff --git a/cs172/Lect02/readme.txt b/previous/cs172/Lect02/readme.txt
similarity index 100%
rename from cs172/Lect02/readme.txt
rename to previous/cs172/Lect02/readme.txt
diff --git a/cs172/Lect03/EL.py b/previous/cs172/Lect03/EL.py
similarity index 100%
rename from cs172/Lect03/EL.py
rename to previous/cs172/Lect03/EL.py
diff --git a/cs172/Lect03/WorkingClock.py b/previous/cs172/Lect03/WorkingClock.py
similarity index 100%
rename from cs172/Lect03/WorkingClock.py
rename to previous/cs172/Lect03/WorkingClock.py
diff --git a/cs172/Lect03/demo.py b/previous/cs172/Lect03/demo.py
similarity index 100%
rename from cs172/Lect03/demo.py
rename to previous/cs172/Lect03/demo.py
diff --git a/cs172/Lect03/lect3.py b/previous/cs172/Lect03/lect3.py
similarity index 100%
rename from cs172/Lect03/lect3.py
rename to previous/cs172/Lect03/lect3.py
diff --git a/cs172/Lect03/len_demo.py b/previous/cs172/Lect03/len_demo.py
similarity index 100%
rename from cs172/Lect03/len_demo.py
rename to previous/cs172/Lect03/len_demo.py
diff --git a/cs172/Lect03/new.py b/previous/cs172/Lect03/new.py
similarity index 100%
rename from cs172/Lect03/new.py
rename to previous/cs172/Lect03/new.py
diff --git a/cs172/Lect03/old.py b/previous/cs172/Lect03/old.py
similarity index 100%
rename from cs172/Lect03/old.py
rename to previous/cs172/Lect03/old.py
diff --git a/cs172/Lect03/starter_code.py b/previous/cs172/Lect03/starter_code.py
similarity index 100%
rename from cs172/Lect03/starter_code.py
rename to previous/cs172/Lect03/starter_code.py
diff --git a/cs172/Lect04/hello.py b/previous/cs172/Lect04/hello.py
similarity index 100%
rename from cs172/Lect04/hello.py
rename to previous/cs172/Lect04/hello.py
diff --git a/cs172/Lect05/boilerplate.py b/previous/cs172/Lect05/boilerplate.py
similarity index 100%
rename from cs172/Lect05/boilerplate.py
rename to previous/cs172/Lect05/boilerplate.py
diff --git a/cs172/Lect05/bubble.py b/previous/cs172/Lect05/bubble.py
similarity index 100%
rename from cs172/Lect05/bubble.py
rename to previous/cs172/Lect05/bubble.py
diff --git a/cs172/Lect05/bubble_bounce.py b/previous/cs172/Lect05/bubble_bounce.py
similarity index 100%
rename from cs172/Lect05/bubble_bounce.py
rename to previous/cs172/Lect05/bubble_bounce.py
diff --git a/cs172/Lect05/bubbles.py b/previous/cs172/Lect05/bubbles.py
similarity index 100%
rename from cs172/Lect05/bubbles.py
rename to previous/cs172/Lect05/bubbles.py
diff --git a/cs172/Lect05/dragon_drop.py b/previous/cs172/Lect05/dragon_drop.py
similarity index 100%
rename from cs172/Lect05/dragon_drop.py
rename to previous/cs172/Lect05/dragon_drop.py
diff --git a/cs172/Lect05/drawable.py b/previous/cs172/Lect05/drawable.py
similarity index 100%
rename from cs172/Lect05/drawable.py
rename to previous/cs172/Lect05/drawable.py
diff --git a/cs172/Lect05/hello.py b/previous/cs172/Lect05/hello.py
similarity index 100%
rename from cs172/Lect05/hello.py
rename to previous/cs172/Lect05/hello.py
diff --git a/cs172/Lect05/mario_black.png b/previous/cs172/Lect05/mario_black.png
similarity index 100%
rename from cs172/Lect05/mario_black.png
rename to previous/cs172/Lect05/mario_black.png
diff --git a/cs172/Lect05/mario_blue.png b/previous/cs172/Lect05/mario_blue.png
similarity index 100%
rename from cs172/Lect05/mario_blue.png
rename to previous/cs172/Lect05/mario_blue.png
diff --git a/cs172/Lect05/mario_gold.png b/previous/cs172/Lect05/mario_gold.png
similarity index 100%
rename from cs172/Lect05/mario_gold.png
rename to previous/cs172/Lect05/mario_gold.png
diff --git a/cs172/Lect05/target.py b/previous/cs172/Lect05/target.py
similarity index 100%
rename from cs172/Lect05/target.py
rename to previous/cs172/Lect05/target.py
diff --git a/cs172/Lect06/PQ.py b/previous/cs172/Lect06/PQ.py
similarity index 100%
rename from cs172/Lect06/PQ.py
rename to previous/cs172/Lect06/PQ.py
diff --git a/cs172/Lect06/hello.py b/previous/cs172/Lect06/hello.py
similarity index 100%
rename from cs172/Lect06/hello.py
rename to previous/cs172/Lect06/hello.py
diff --git a/cs172/Lect06/myqueue.py b/previous/cs172/Lect06/myqueue.py
similarity index 100%
rename from cs172/Lect06/myqueue.py
rename to previous/cs172/Lect06/myqueue.py
diff --git a/cs172/Lect06/mystack.py b/previous/cs172/Lect06/mystack.py
similarity index 100%
rename from cs172/Lect06/mystack.py
rename to previous/cs172/Lect06/mystack.py
diff --git a/cs172/Lect07/hello.py b/previous/cs172/Lect07/hello.py
similarity index 100%
rename from cs172/Lect07/hello.py
rename to previous/cs172/Lect07/hello.py
diff --git a/cs172/Lect07/linkedlist.py b/previous/cs172/Lect07/linkedlist.py
similarity index 100%
rename from cs172/Lect07/linkedlist.py
rename to previous/cs172/Lect07/linkedlist.py
diff --git a/cs172/Lect07/node.py b/previous/cs172/Lect07/node.py
similarity index 100%
rename from cs172/Lect07/node.py
rename to previous/cs172/Lect07/node.py
diff --git a/previous/cs172/Lect08/hello.py b/previous/cs172/Lect08/hello.py
new file mode 100644
index 0000000000000000000000000000000000000000..061448a8d1383c3b10b99d3b4667be38bd953c3a
--- /dev/null
+++ b/previous/cs172/Lect08/hello.py
@@ -0,0 +1 @@
+print("Hello CS 171")
diff --git a/cs172/Lect09/BSTree.py b/previous/cs172/Lect09/BSTree.py
similarity index 100%
rename from cs172/Lect09/BSTree.py
rename to previous/cs172/Lect09/BSTree.py
diff --git a/cs172/Lect09/Node..py b/previous/cs172/Lect09/Node..py
similarity index 100%
rename from cs172/Lect09/Node..py
rename to previous/cs172/Lect09/Node..py
diff --git a/cs172/Lect09/Node.py b/previous/cs172/Lect09/Node.py
similarity index 100%
rename from cs172/Lect09/Node.py
rename to previous/cs172/Lect09/Node.py
diff --git a/cs172/Lect09/hello.py b/previous/cs172/Lect09/hello.py
similarity index 100%
rename from cs172/Lect09/hello.py
rename to previous/cs172/Lect09/hello.py