If you want to reset all the tutorials, you have to:
1. Go to the "More" tab.
2. Tap on the "Settings" menu option.
3. Tap on "Reset the Tutorials".
Note: If you confirm that you want to reset all the tutorials, then all of the tutorials from the app (for Alphabet, Words, and Sentences) that have already been watched will be renewed, and you will be able to go through them again.
You can also watch our video on how to reset all the tutorials here.