Solidworks Tutorial for Beginners #8: Slot. 
The objective of this tutorial is to introduce to you the Slot sketch tools, and how to use them.
At the end of this tutorial, you would be able to sketch using the slot tool, and in the multiple sketch configurations.
To access the tutorial playlist: https://www.youtube.com/channel/UCI-7KFfWRon1VfK0Z2v879Q/playlists
Step 1: Solidworks Tutorial for Beginners #8: Slot.