This study is great for doing STEM/STEAM projects AND summer learning! This popular bundle introduces the golden ratio or golden number and the Fibonacci number series in three in-depth thematic unit studies. The golden ratio and Fibonacci number series can be found in nature, art, and architecture and has been studied by famous artists and scientists such as Leonardo da Vinci and Rembrandt. The Fibonacci number series (0, 1, 1, 2, 3, 5, 8, 13...etc.) and the Hindu-Arabic numerals we use today (