These gorgeous Ombre Mason Jars are easy to make using just Acrylic Craft Paint and a Clear Sealer. It's important to clean the jars first if they're not brand new so that the paint adheres. The tutorial includes step by step details on how to achieve the perfect finish. Be sure to check out the Vintage Mason Jars too.
Beautiful digital art you could display in your classroom to facilitate discussion about global warming. You could present one of images and ask the students what they think it's trying to convey, no text is needed to spark discussion. Great way to get students interested and engaged in the topic.