Update README.md

iamshaunjp · web-flow · commit 18c3c3fd8c1f · 2019-09-18T21:40:40.000+01:00
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 # flutter-firebase
 All course files for the Flutter &amp; Firebase tutorial playlist on The Net Ninja YouTube channel
+
+## how to use this repo
+Each lesson in the playlist has it's own code in it's own branch. To see the code for lesson 7, for example, you would select the lesson-7 branch.
