In this video Paul Andersen describes several types of evidence for common ancestry. This evidence is contained in the fossils, embryos and molecules of living organisms. Even though life on our planet is incredibly diverse there are common threads that run through everything. This idea was most elegantly put forward by Charles Darwin before much of this evidence was gathered. A teaching progression K-12 is also included.
In this video Paul Andersen explains the importance of scale in science and engineering. The Universe varies in size along three scales: size, timespan, and energy. Many phenomenon are too small and fast, or two large and slow to observe. We use the tools of proportion and units of measure to comprehend different scales. The video ends with a progression of instruction from K-12
Paul Andersen explains how scientists analyze and interpret data. Data can be organized in a table and displayed using a graph. Students should learn how to present and evaluate data.