I always attach a hanger with tape to the back of my posters that I do not staple to the wall so they are easy to move, store in the closet and easy to hang.
The reason I made this poster is because I am trying to make more of the science experiments that we are doing in class using the scientific method format. Below are two examples that I made that go with my earthworm study:
Here is the link to get the 2 experiments shown:
Here is the link for the info. on the poster so you can make your own: