An informative, engaging, and funny PowerPoint that gets the class to interact during the lesson. Teaches the difference between the two dating systems -- a must-teach early on in World History Courses.
Also teaches students what an "era" is.
Use the white board to create a blank timeline, with a line in the middle for the transition from BCE/ BC to CE/ AD, put birthdays up there that the students volunteer and compare them to Cleopatra's birthday.
The rest of the lesson speaks for itself. There are pauses to check for understanding and gifs and images to make students laugh. Yes, even my high-schoolers at a Title 1 school laughed.
Use this for the first half of class, then create an assessment to check for understanding.