Update index.md

Author: mrchanr

index.md

@@ -3,7 +3,7 @@ layout: default
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 ### Course Introduction
-* [8th Grade Night Presenation](https://docs.google.com/presentation/d/1hvNR-7O2xrO2HkLfoFMS5jWQ4QSTdv9m-vXTorBZ_BU/edit?usp=sharing)
+* [8th Grade Night Presentation](https://docs.google.com/presentation/d/1hvNR-7O2xrO2HkLfoFMS5jWQ4QSTdv9m-vXTorBZ_BU/edit?usp=sharing)
 * [Back to School night presentation](https://docs.google.com/presentation/d/1ZtnVADnaV0Zw3bwaMI-afDTKzfhJmo93TUDrQmH4tI8/edit?usp=sharing)
 * [Course Syllabus](https://docs.google.com/document/d/1jJ3meI3F2s8PCuQ1sx0G20qfNCOffRgh0zpdwDNdBrc/edit?usp=sharing)
 * [Intro Slide Presentations](https://docs.google.com/presentation/d/1n-AMkqXPg63QfbMCoench9uYc3RVrwcT4IavPyGZ9TA/edit?usp=sharing)