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Lesson-3.markdown

@@ -19,7 +19,7 @@ The plan is to follow the instructions for Lesson 3 [1].
 ### Exercise 1 and 2
 
 Due to the similarity between exercise 1 and 2 the results have been joined together.
-In order to test the sound sensor we made a test setup were the LEGO car was placed next to a computer loudspeaker playing a monotone sound (440Hz sine wave). The leJOS data logger was used to collect the sound levels recorded by the sensor. The setup is seen in figure 1. 
+In order to test the sound sensor we made a test setup where the LEGO car was placed next to a computer loudspeaker playing a monotone sound (440Hz sine wave). The leJOS data logger was used to collect the sound levels recorded by the sensor. The setup is seen in figure 1. 
 
 ![Test setup](http://gitlab.au.dk/uploads/rene2014/lego/a6a24b2215/Exercise_2_-_Test_setup.jpg)