update acc

docs/lessons/charting/acceleration.md

@@ -35,19 +35,19 @@ NOTE: The colors of the charts reflect the color of the micro:bit simulator. In
 
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-After running this simulatation several seconds by moving the micro:bit side to side in the x direction, you are ready to graph or chart the accceleration of the micro:bit. We want a printout of our acceleration on Excel. We will graph the fluctuating acceleration of the simulation experiment. 
+Vigorously move the micro:bit in the micro:bit simulatator by moving the micro:bit image from side to side. Every time the micro:bit moves in the x direction in the simulator,  you are generating data points that can be reviewed in Excel. The more attempts to move the micro:bit from side to side, the more data being saved in Excel. After you have vigarously moved the micro:bit simulator from side to side for a sufficient amount of time, you are ready to graph or chart the accceleration of the micro:bit. We want a printout of our acceleration on Excel that can be graphed in Excel. 
 
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-Finally, you must open the Excel CSV file by clicking on the data.xls file that was downloaded to Downloads Folder. 
+The final part of this experiment is opening and reviewing the data in the Excel CSV file. Simply click on the line beneath the simulator. A CSV file will be generated to display the data points collected by moving the micro:bit in the X direction. Then click or tap on the data Excel file that was downloaded to your local Downloads Folder. 
 
 ![](/static/mb/data3.png)
 
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 * Review and write down your observations from the Excel data.
+* Chart the data collected by using a graph in Excel
 * Connect a micro:bit to your computer using your USB cable; compile; and move the micro:bit in the "x" direction. 
-* Review and analyze the actual micro:bit device acceleration data on Excel
+* Review and analyze the actual micro:bit device data on Excel
-
 
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