DC Circuits class, make sure you watch and learn these video lessons.
The full theory at the board live for the week 5 and 6 major series parallel lab. Here is the link: https://youtu.be/gA33RNRdtfA
Also… a second video for the bigger circuit we studied in class. If you missed the board notes for that, here is the full lesson in video : https://youtu.be/02yFWXmbrHQ