We use the MindUp Curriculum from the Hawn Foundation. It has a lesson titled "Choosing Optimism" which I think is one of the most important lessons. Optimism is a learned trait and if practiced, can become a way of thinking. The Curriculum suggests about 4 books as Literature Links and the ones for this lesson are okay but my favorite book on optimism Is Rain Brings Frogs by Maryann Cocca-Leffler. She is a great author and the message of hope in this book is powerful and the illustrations capture the audience. I use this with grade 2.