I used spring mounted rods since I am not allowed to make holes in the walls at school. Be sure you measure your windows as they sell several different sizes - something I had to learn the hard way...
Fabric scraps, ribbons, lace, etc.
Back in the day I used to do a lot of quilting, so I have a lot of scraps of fabric in my storage closet, but you can also purchase fat quarters or even miscellaneous bits of fabric at your local craft store.
Fabric scissors are the best, but you could also use pinking shears or regular scissors as long as they are sharp enough to cut the fabric.
Anything that measures in inches will work, but honestly you could "eyeball it" in a pinch.
As I mentioned before, I have a lot of leftover supplies from my quilting days, so I used these instead of scissors. I found it to be faster, but it's totally optional.
@iteachstem so I can see your version of these super easy curtains!
I loved making these so much that I ended up creating a table skirt for the ceramic art studio my hubby and I own to hide the clutter of boxes and bubble wrap and unfinished pieces. They are so cute and WAY easy. I just tied the fabric strips to wooden dowel rods and used command hooks to attach them to the table! I'm in love!