Spreadsheets have become the mathematical laboratories for business, for science, for technology, and even for many consumers. They are the way we do our math, the primary tool for quantitative reasoning, and yet they are barely mentioned in our schools. They were mentioned only once in the New York Times article. They were mentioned only seven times in the Common Core State Standards in Math (fractions were mentioned 210 times). They are the primary mathematics tool of the 21st century, yet they are virtually invisible to most of our students.