That is fascinating. We call these places 'Montessori' but it just shows that they are as varied as any other preschool.
At DD3's Montessori the structure is:
-Children arrive and pick their name from the board
-They choose a peg and stick their name above it
-They get their name from a table and post it through the letter box
-They put their lunch bag in the kitchen.
There are trays with activities laid out, on a wooden bench. They can choose to take one of these. If it is a new (to them) activity, the teacher will show them how it is used.
There are lots of construction, literacy, sciencey materials out at all times. If they want to do something on the floor, they get a mat from the unit to lay out. This defines their space and shows other children that they are working on something.
The outside space is available all the time. Ratios are high enough for individualisation.
They have circle time, where they learn about something topical, celebrate a birthday, or sing songs, etc.
They have yoga on a Monday and Wednesday, French, etc.