Help Me Choose Curtain Fabric For Our Schoolroom, Please!

Here is my inspiration.  It's a throw rug I found on sale at that unmentionable store.  I want curtains with that red and maybe the green and orange.  I don't usually decorate with bright colors but since this is for the schoolroom I want to try something more bold.  I was thinking polka-dots if I can find fabric with the right colors.  I saw a really cute shower curtain that had dots in a spiral pattern but the colors were wrong.  I'm going to try Target and the fabric store this weekend.

I love this rug and the liveliness it has added to the room.

Here is the window freshly painted and trimmed out.  My husband made a wide sill so I can have a decent sized pot sit in the sun.  I'm thinking about using curtains on the sides of the window with a decorative rod above.  I don't want to block any light.  I think the curtains should be as long as the window is tall. 

Here's a close up so you can get a better idea of what the trim looks like.  The wall opposite this one is sage green.  My husband jokingly suggested I knit a curtain.  I can kind of see that, an open crochet pattern in red.  Except that would take too long and might look strange and then I would have wasted hours.

And here are two of the new pots I bought today.  I've been stalking the floral one and another shaped like a teapot since spring.  They were finally priced right for me.  Does that give you more of the feel I'm going for in this room?

I have a nice view of the compost bins and tomato plants, ha!

So, any suggestions?  Oh and I apologize for the bad lighting.  I should have waited until tomorrow or this afternoon to get a better shot but I'm impatient.