Category: Blog

Welcome to What if Math

Three years ago I read a wonderful book by Keith Devlin called The Man of Numbers. It told the story of Leonardo of Pisa who was the first to convert Arabic arithmetic and algebra for European use. Devlin told Leonardo’s story and he described the process by which Leonardo’s book Liber abbaci (The Book of Calculation) became the basis for both the teaching of students and the development of European mathematics. Leonardo viewed his book and his task as providing a new means for merchants and businessmen to do the calculation they needed, replacing the slow, cumbersome, and error prone Roman Numerals they were then using. Devlin included the table of contents of Liber abbaci.

When I took a close look at that TOC, I saw the K-12 math curriculum we require every student today to master. I was awestruck. The math we teach our students today is the math Leonardo defined to meet the needs of medieval traders and bankers. It was not “basic.” It was not fundamental. It was the math needed and designed for 13th century business. It is obsolete! Business today does not use most of it and has no need for most of it. Do our children need to learn “long division”?

Since the invention of the personal computer spreadsheet in 1979, business has focused on the math of functions and not of solving equations with machines calculating we no longer require pencil and paper algorithms to do arithmetic. I have been a math educator for over 40 years and not only did it finally dawn on me that much of the math we teach is no longer necessary, but that the math we should be teaching, the math our students will need to learn and use, is the math of spreadsheets and not the math of Leonardo.

I started working with some wonderful friends to think about what this reinvention of mathematics education would look like. Peter Mili a truly great math teacher, Larry Reeves my longtime collaborator, George Blakeslee my educational mentor, Steve Bayle my technology mentor and one of the spreadsheet pioneers, my sons Brenan and Arran, and wonderful other friends who helped us think through and grow these ideas.

We developed our first version of What if Math two years ago as case studies for problem-based-learning. They were difficult to develop and difficult to use. Last fall I started making some spreadsheets for my friend Megan Peterson to try in her 2nd grade classrooms, and in January my friend, Craig Kelley, after seeing those primitive lessons, challenged me during one of our many breakfasts and lunches talking about the future of education. “I get the need, but if you want me to believe in a spreadsheet-based curriculum you need to show me what a 2nd grade curriculum would look like.”

I took up Craig’s challenge and over the past year months we have been developing these lessons for, by, and on spreadsheets. We have more than 60, spread across the curriculum to serve as models for many more. We have another 40 in our pipeline and more in our imaginations. This summer and winter break, Ryan McQuade, still an art student at Lesley University, has made them beautiful and developed a great website to make them accessible. We give them to you at no cost to begin to build the math curriculum of the future. Our dream is to make learning mathematics a creative, challenging, and collaborative experience for every student.

I look forward to your experiences and your thoughts and hope your students get the same thrill in learning that we have experienced.

Art

 

Learning as a Creative Experience

Sir Ken Robinson
Sir Ken Robinson

We are in a time of dramatic, some would say, revolutionary change in education, “challenging” as Sir Ken Robinson says, “what we take for granted.” His How Schools Kill Creativity, the most watched Ted Talk of all time, shows we hunger for learning as a creative experience. Yet we continue to treat learning math as a mechanical process focused on fluency in paper-based algorithms that demands monotonous practice. This curriculum with its ladder of “basic” skills from place value through solving quadratic equations was defined by Leonardo of Pisa in the year 1202 for traders, merchants, and lenders. It is obsolete! Machines run our algorithms and solve our equations. 

Function MachineThe math of business today is spreadsheet math based on functions and functional thinking building models, collecting and organizing data, to ask, “What if…” Today, spreadsheets have become the ubiquitous transformative tool, the mathematics technology tool used in science, technology, engineering, mathematics, and even the arts both at work and at home. What if Math brings spreadsheets, functions, and functional thinking to math education enabling students to learn math as a creative experience. Students work on Labs, not problems or exercises, using spreadsheets as laboratories to see patterns, build models, collect data, visualize, and ask What if…. What if Math has more than 100 Labs as models for a reinvention of the math curriculum. And we are adding new ones all the time. Labs range from foundational concepts like place value through algebraic functions. Labs include case studies for practicing problem solving on topics from sports to financial reasoning emphasizing out-of-the-box thinking and intuitive reasoning. Labs are experiments that students at all levels can use to learn math, to gain spreadsheet skills, to gain programming skills, and to develop out-of-the-box problem solving 21st century thinking. We seek to make learning a creative experience.

Spreadsheets and the Rule of Four

A little over 20 years ago the Harvard Calculus Consortium sought to remake the calculus curriculum. “We believe that the calculus curriculum needs to be completely re-thought,” began the text by Andrew Gleason and Deborah Hughes Hallett, both of Harvard University. They sought to get “our students to think.” In doing so they proposed “The Rule of Three.” “Our project is based on our belief that these three aspects of calculus—graphical, numerical, analytical—should all be emphasized throughout.” The Rule of Three, today often known today as The Rule of Four with the now addition of verbal, rests at the heart of math education. While the Calculus Consortium’s book may no longer own major market share, it has had a remarkable influence on all Calculus textbooks and indeed on all math textbooks in both K-12 and college. It is a widely shared belief that such multiple-linked representations must be central to 21st century pedagogy. It is clear that students learn in different ways. It is certain that they need to see mathematics from different perspectives.

Spreadsheets are Rule of Four platforms. They are function machines which naturally represent mathematics graphically, numerically, analytically, and verbally. They show a function as a graph, as a table, as a formula, and we can describe them with text and visuals. They did not start out that way. The first spreadsheet, VisiCalc invented by Bob Frankston and Dan Bricklin was designed to be a visual calculator to automate the accountants’ worksheets. Three years after VisiCalc’s debut in 1979, Mitch Kapor added graphs and tables to create Lotus 123 which brought the IBM PC into every business. And Excel from Microsoft came out for the new Macintosh 2 years later not only simplifying the interface but adding beautiful texts and visuals to spreadsheets. Today, the mature spreadsheet technology is the standard quantitative tool for business worldwide. It is not only available on every major platform, but its format and design are the basis for displaying and interacting with quantity on the Web.

In a spreadsheet we can write a formula, use that formula to create a table of values, and use that table of values to make a wide variety of different graphs and charts. Change the formula and the table and graph changes automatically. Change the table and the graph changes automatically. Spreadsheets are dynamic and highly interactive. They even let you embed variable quantities in text to add units to quantities our dynamic values to verbal descriptions. Once a student builds a model in a spreadsheet, it is naturally a multiple-linked representation that can played with and explored. Spreadsheet models designed with functional thinking as multiple-linked representations are therefore simulations of which students can ask “What if…”

If you use Link Sheets in your classroom, if you believe that every student has a learning style, if you like to have students explore different representations, if you want to get your “students to think” then try using our What if Math spreadsheets or develop your own built on the Rule of Four.

Small Changes

Small changes, seemingly inconsequential acts, can have momentous repercussions. Dead birds set off the environmental movement. An assassin’s bullet protesting an exhausted empire started a world war that brought down the ruling monarchies of Europe. A tax on tea turned into a revolution. Such a small change occurred in America’s classrooms a little over a half century ago. School desks were unscrewed from the floor. That seemingly small change, which on its surface seemed to be just about furniture, precipitated a major reduction in class size and a revolution in expectations of good teaching. Desks bolted to the floor, locking students in straight rows facing a teacher in the front of the classroom, optimized the use of space.
My 5th grade Chicago classroom with fixed desks held 51 students in 6 rows with 8 desks per row and three portables. It also defined Miss O’Hearn’s teaching style. My 6th grade suburban classroom with moving desks had 25 students. Desks could be rearranged, students could interact with each other, learning in groups was enabled, and teachers could give students individual attention toward student-centered learning. Small changes can have great effects even in education.

We have the opportunity to make such a small, seemingly inconsequential change that could profoundly transform our schools by allowing students to use the internet on their Common Core Math tests.

We need only change the wording in the test’s directions to allow and not prevent student use of a computer/tablet/smart phone. The tests are designed to be given online already. They give the students digital tools to use to solve some of the problems. What if we simply extended that existing open technology requirement to every question and enable students to use most any available program or website? What if they could use Google search to solve an arithmetic problem, or open Excel, Sheets, Numbers, Wolfram Alpha, Khan Academy, Wikipedia or any website they wanted to find an answer? What if, as the PARCC initials stand for, we are serious about the tests assessing “college and career readiness?” A realistic 21st century college or career problem would quite naturally expect the solver to have internet access. College tests are generally open book and every online course must, by its very nature, allow internet access. So why not really prepare our students for college and career?

The consequences of such a minor change in the assessment directions would be far reaching and revolutionary. Teachers would stop teaching the algorithms and stop giving students arithmetic and algebra algorithm worksheets. Why teach long division if the tests don’t require it? Why spend all of that classroom and homework time on operations on fractions if students won’t be tested on it? Why teach students to factor equations using paper and pencil algorithms if they can get the answer online? This mechanical symbol manipulation that today makes up the bulk of student practice time would simply vanish. Creative experiences using technology to solve math problems would naturally replace it, for those will be the “basic skills” required by the tests. Spreadsheets and other quantitative technologies would replace pencil and paper. Mathematics would become more interesting to students for they would no longer need to ask, “Why am I learning this stuff for when I can solve this problem on my old phone or calculator?” Math classrooms could be filled with creative “What if…” experiences.

Not only would there be more time for authentic problem solving in math, but there would be more time for the other STEM subjects, and more time for the arts, for physical education, for history, for the manual arts, for project and performance oriented activities. So many of us dream of an educational system that is rich and creative, but we are overwhelmed by a system seemingly sluggish to innovate, overwhelming in complexity, and demanding in tradition that it seems to make substantial change all but impossible. Yet there are times and circumstances when small, seemingly inconsequential acts can have monumental impacts. Allowing students to use the Web when they take their Common Core math assessments could well be as revolutionary for students today as unscrewing the desks were in the 1950’s.