Here is a quick link about it. But it is really what you make it.
If you want to schedule a science lesson at 11:00, go for a walk and look at birds. It just means that you arent cracking open a text book every single day and working through a structured curriculum.
We use a curriculum b/c unschooling doesnt suit us either.
Hopefully someone will come in and give you some insight on it.
We use A beka. And they have on-line, parent directed on line and text book learning.