The links below provide LEGO Educations' "Action/Flow Palettes" videos for introducing basic programming for the EV3:
Introducing Palettes:
https://elearning.legoeducation.com/lessons/introducing-the-palettes-to-... [1]
The Motor Blocks:
https://elearning.legoeducation.com/lessons/the-motor-blocks [2]
Stop Model Using Sensors:
https://elearning.legoeducation.com/lessons/use-a-sensor-to-stop-the-model [3]