Montage and Series of Shots

A montage is a series of small related scenes, grouped together. A montage example you'll be familiar with is the "falling in love" montage where we see shots of our glowing couple at the amusement park, looking over the ocean, feeding each other dinner, dancing in the rain and, finally... well, you know. Often montages are silent scenes that have music or some other sound over them.

A Series of Shots is similar to a montage, but takes place in one location during one piece of time. Think of a chase scene when you see a car racing through the street, then a baby carriage wheeled across the street, then the cop chasing the first car, then the first car narrowly missing the baby carriage and the cop car having to stop to avoid hitting it.

Montages and Series of Shots are formatted the same way:

MONTAGE OF THE UFOs LANDING

A) The ship settles on the Washington Monument.
B) Humans are rounded up into Candlestick Park as more 
   ships land in the parking area.
C) An African tribal leader chats with one of the aliens.

SERIES OF SHOTS

A) Police swarm the Federal Building.
B) Ambulances swerve into the driveway.
C) SWAT teams aim their guns.

Just to note, the first line "Montage of..." is a Scene Heading. The first line of "Series of Shots" is a Shot. The other lines are Action elements. You could just say "MONTAGE" without the "OF THE UFOs LANDING." Whether you add the extra description is up to you.

It's also optional whether you, at the end of a Montage or Series of Shots, add an Action line that says:

END MONTAGE

or

END SERIES OF SHOTS

If you write the Montage or Series of Shots well, it's obvious when they end, so I would avoid the ending indicators.