Do you start work on measures in Numeracy and they have forgotten all they ever knew?
Do children ask you for the website of the game you just played in class?
The idea of 'flipping your classroom' (so children learn before they come to class and classwork is more about application) is more of a Secondary phenomenon.
However, you can prepare your pupils for learning, by using your class blog.
As I do my planning, which invariably involves putting weblinks, Youtube videos etc. into my school's planning sheet, I simply have my Weebly website editor open.
Every time, I cut and paste, I also paste into the Weebly editor, giving my pupils a list of the games / videos they will be looking at during the week.
Does every child access it? No, but each Monday, 3 or 4 of the class have already played games, watched videos etc. about the week's work! What a great start to making progress....
Here are examples of blogs I have used to prepare the children:
Hope this gives you some ideas!