diff --git a/AddOnsAndExtensions/SpeedOfSound/SpeedOfSound_Instructor.ipynb b/AddOnsAndExtensions/SpeedOfSound/SpeedOfSound_Instructor.ipynb
index 7c4574b..eae40b2 100644
--- a/AddOnsAndExtensions/SpeedOfSound/SpeedOfSound_Instructor.ipynb
+++ b/AddOnsAndExtensions/SpeedOfSound/SpeedOfSound_Instructor.ipynb
@@ -77,7 +77,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 6,
    "metadata": {},
    "outputs": [
     {
@@ -126,7 +126,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": 7,
    "metadata": {},
    "outputs": [
     {
@@ -161,7 +161,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 8,
    "metadata": {},
    "outputs": [
     {
diff --git a/BathymetryLab/Handouts/BathymetryLab.ipynb b/BathymetryLab/Handouts/BathymetryLab.ipynb
index d8596f8..636b6d5 100644
--- a/BathymetryLab/Handouts/BathymetryLab.ipynb
+++ b/BathymetryLab/Handouts/BathymetryLab.ipynb
@@ -23,7 +23,7 @@
     "<img src=\"../../images/jsnsr04.png\" width=\"400\">\n",
     "\n",
     "## Assembling your JSN-SR04 Sensor\n",
-    "Begin by connecting the **JSN-SR04** to your **ESP8266**.  The JSN-SR04 uses the same wiring as the HCSR04 (above) and  requires 5 volts, so for this excersize you will use your microcontroller in a breadboard, powered by the USB cable from your computer  The USB cable provides 5V to the board, which means we can use the *USB* pin on the ESP8266 to give 5V to the JSN-SR04.\n",
+    "Begin by connecting the **JSN-SR04** to your **ESP8266**.  The JSN-SR04 uses the same wiring as the HCSR04 (above) and  requires 5 volts, so for this exercise you will use your microcontroller in a breadboard, powered by the USB cable from your computer  The USB cable provides 5V to the board, which means we can use the *USB* pin on the ESP8266 to give 5V to the JSN-SR04.\n",
     "\n",
     "The JSN-SR04 sensor has 4 pins, *GND*, *VCC*, *Trig*, and *Echo*.  For this excercise:\n",
     "1. Connect the Trig pin on the JSN-SR04T to GPIO 12 on the ESP8266 Feather\n",
@@ -62,11 +62,16 @@
     "|1| Meaurement \\#1,  \\#2,  \\#3,  \\#4,  \\#5|\n",
     "|2| Meaurement \\#1,  \\#2,  \\#3,  \\#4,  \\#5|\n",
     "|...|...|\n",
-    "|*n*| Meaurement \\#1,  \\#2,  \\#3,  \\#4,  \\#5|\n",
-    "\n",
+    "|*n*| Meaurement \\#1,  \\#2,  \\#3,  \\#4,  \\#5|"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
     "Collect repeat samples at each fixed distance point.  Do all of the values collected appear to be valid?\n",
     "\n",
-    "Once your sample table is complete, create a plot of the bathymetry in *Canopy* using the Python code below.  For the depth value, take the median of the measurements at each distance that you believe to be correct in order to remove bad samples or noise.  "
+    "Once your sample table is complete, create a plot of the bathymetry using the Python code below.  For the depth value, take the median of the measurements at each distance that you believe to be correct in order to remove bad samples or noise.  "
    ]
   },
   {
diff --git a/BathymetryLab/Handouts/BathymetryLab_Pyserial.ipynb b/BathymetryLab/Handouts/BathymetryLab_Pyserial.ipynb
index 64dab78..ccf8e4b 100644
--- a/BathymetryLab/Handouts/BathymetryLab_Pyserial.ipynb
+++ b/BathymetryLab/Handouts/BathymetryLab_Pyserial.ipynb
@@ -26,7 +26,7 @@
     "<img src=\"../../images/Feather_jsnsr04.png\" width=\"300\">\n",
     "\n",
     "## Assembling your JSN-SR04 Sensor\n",
-    "Begin by connecting the **JSN-SR04** to your **ESP8266**.  The JSN-SR04 uses the same wiring as the HCSR04 (above) and  requires 5 volts, so for this excersize you will use your microcontroller in a breadboard, powered by the USB cable from your computer  The USB cable provides 5V to the board, which means we can use the *USB* pin on the ESP8266 to give 5V to the JSN-SR04.\n",
+    "Begin by connecting the **JSN-SR04** to your **ESP8266**.  The JSN-SR04 uses the same wiring as the HCSR04 (above) and  requires 5 volts, so for this exercise you will use your microcontroller in a breadboard, powered by the USB cable from your computer  The USB cable provides 5V to the board, which means we can use the *USB* pin on the ESP8266 to give 5V to the JSN-SR04.\n",
     "\n",
     "The JSN-SR04 sensor has 4 pins, *GND*, *VCC*, *Trig*, and *Echo*.  For this excercise, connect the *trig* pin on the JSN-SR04 to GPIO pin 12 on the ESP8266, and the *echo* pin to GPIO pin 14.  Connect *GND* to *GND* and *VCC* to *USB*.\n",
     "\n",