.

lessons/00_Turtles/01_Get_Started.ipynb

@@ -69,6 +69,8 @@
     "* Notebook files end with `.ipynb`. These files are very special, because they are both \n",
     "  documents and have programs that you can run. \n",
     "\n",
+    "## Run Notebook Code Cells\n",
+    "\n",
     "Notice that this file, ``01_Get_Started.ipynb`` is a Notebook file. If you are reading\n",
     "the file in Visual Studio Code, you will see \"⏩ Run All\" at the top of the screen, \n",
     "and some paragraphs that have code will have a \"▶️\" on the left side. \n",
@@ -133,14 +135,28 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Now let's run a Python program,  which is in the file named ``02_Meet_Tina.py``. \n",
+    "## Run `.py` programs\n",
+    "\n",
+    "The files that end in `.py` are normal Python program, and the type of program you will \n",
+    "run most often.  Now let's run a Python program,  which is in the file named ``02_Meet_Tina.py``. \n",
     "\n",
-    " To run the program:\n",
+    "There are a few ways to do this:\n",
+    "\n",
+    "### Use the  ▶️  button\n",
     "\n",
     "1. Click on the file name to open the file\n",
     "2. Look in the upper right for these icons: <img style=\"vertical-align:middle\" src=\"https://images.jointheleague.org/vscode/run_buttons.png\" height=\"25px\" > \n",
     "    click on the ▶️ run button to run the program.  \n",
-    "3. Click on the window to close it. \n"
+    "3. Click on the window to close it. \n",
+    "\n",
+    "### Hit the F5 Key\n",
+    "\n",
+    "You can also run the program by hitting the F5 key. On a Mac, you will have to hold down the fn key and then hit F5. \n",
+    "\n",
+    "\n",
+    "<div class=\"alert alert-warning\">\n",
+    "  You can't run a program again until you end the currently running program. If you see a turtle window open, then you should either click on the window to close it ( if the program ends with `turtle.exitonclick()` or click on the X in the upper right of the turtle window. )\n",
+    "</div>"
    ]
   },
   {

lessons/00_Turtles/02_Meet_Tina.py

@@ -45,7 +45,7 @@
 tina.pendown()
 tina.color('red')                       # Set the color of tina to red
 tina.begin_fill()
-tina.circle(100, steps=50)
+tina.circle(101, steps=50)
 tina.end_fill()
 
 turtle.exitonclick()                    # Close the window when we click on it

lessons/00_Turtles/03_Check_In_Your_Code.ipynb

@@ -12,12 +12,22 @@
     "Github codespace will be stopped automatically, then deleted after a few weeks,\n",
     "and you will lose your changes. So check your code in!\n",
     "\n",
-    "On the left side of the Codespace window, look for this icon. The number may be\n",
-    "different for you ( it will probably be 1). \n",
+    "## Make a Change\n",
+    "\n",
+    "Let's make a change to `02_Meet_Tina` so we have something to checking. You can\n",
+    "change anything you want! Maybe make the circle a diffferent size \n",
+    "( change `tina.circle(100, steps=50)` ) or change what tina says ( change\n",
+    "`tina.write(\"Why, hello there!\")` ) or anything else, then save your file. \n",
+    "\n",
+    "## Commit and sync your code\n",
+    "\n",
+    "Once you have made the change, save your file. Then, on the left side of the\n",
+    "Codespace window, look for this icon. The number may be different for you ( it\n",
+    "will probably be 1). \n",
     "\n",
     "<center><img src=\"https://images.jointheleague.org/vscode/git_changes.png\" width=\"100px\"></center>\n",
     "\n",
-    "This is the Git icon; click on it to get accecss to the Source Control tool for\n",
+    "This is the Source Control icon; click on it to get accecss to the Source Control tool for\n",
     "checking in your code. Now the Source Control pane should look like this: \n",
     "\n",
     "<center><img src=\"https://images.jointheleague.org/vscode/sc_changes.png\" width=\"400px\"></center>\n",

lessons/00_Turtles/04c_Turtle_Tricks.py

@@ -22,3 +22,6 @@
 ... # Your code here
 
 turtle.exitonclick()                    # Close the window when we click on it
+
+
+# Dont forget to check in your code!

lessons/00_Turtles/06_Variables_and_Functions.ipynb

@@ -6,6 +6,17 @@
    "source": [
     "# Variables and Functions\n",
     "\n",
+    "<div class=\"alert alert-info\">\n",
+    "  A few thigns to remember:\n",
+    "\n",
+    "  1) Commit your code! Review  `03_Check_In_You_Code` for a reminder \n",
+    "    on how to commit and sync your changes. \n",
+    "  2) Remember that these `.ipynb` files have runable cells. Review `01_Get_Started`, \n",
+    "    in the section \"Running Programs\" for a reminder on how to run code cells in this file. \n",
+    "   \n",
+    "</div>\n",
+    "\n",
+    "\n",
     "Here is one of the ways to solve the last assignment, making shapes with a\n",
     "loop:\n",
     "\n",
@@ -33,9 +44,20 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 1,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "60.0"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "# Run me\n",
     "# Compute the angle for a number of sides\n",