Whilst I hope that this post provides some rainbow inspiration for you, before you go any further, I recommend reading my article: To Decorate or Not to Decorate. I sum up all the lessons I've learnt over the years in regards to setting up a classroom (Spoiler Alert: I haven't always gotten it right!) and tackle the debate surrounding classroom decorating! You can read the blogpost here.
Looking for rainbow themed decor packs? Download them here.