Fun with SumBlox

We have been having fun with our SumBlox, which recently arrived.  The number blocks are cleverly designed so that the height of each is proportional to its value.

Here we have the ten block

sumblox 10

and here we have multiple mathematical ways to achieve the same height as the ten block:  five + five, three + seven, and nine + one.

sumblox sums

So far, playing with SumBlox seems like a fun way to build number sense and explore basic properties of addition like equivalence and commutativity.  But there does seem to be one problem:  I think they got the height of this block wrong!

sumblox infinity

Rosenthal Prize Application Workshop

I recently participated in a workshop hosted by the Museum of Mathematics about the Rosenthal Prize for Innovation in Math Teaching.  The Rosenthal Prize invites classroom teachers to submit outstanding, fun, creative, and engaging math lessons:  the author of the best lesson receives $25,000, and other noteworthy submissions are honored as well.

The purpose of the workshop was to help prospective applicants understand the submission, revision, and judging process for the prize.  The workshop panel included the directors of the museum, past judges, and three former winners of the Rosenthal Prize (including myself).

The video is embedded below, or you can watch on YouTube here.

Please spread the word about the Rosenthal Prize:  it’s rare to have such incentive to build and share creative, engaging mathematics lessons!

Building the Profession of Math Teachers

msri national math festivalThis past week I traveled to Washington, D.C., to speak at a policy briefing sponsored by the Mathematical Sciences Research Institute.  The briefing was part of a policy day held in advance of MSRI’s first ever National Math Festival.

The theme of the briefing was “Building the Profession of Math Teachers in America”.  I was invited to give a teacher’s perspective on professional development, and to talk about what successful programs look like to teachers and the impact they have on classrooms and schools.

I spoke about the influence that programs like Math for America and PCMI have had on me, my colleagues and, in turn, our school.  These programs inspire and empower teachers, and help create an environment where teachers are more willing and able to take on the challenges that schools and districts face.

Here’s an excerpt from the closing of my speech.

I’ve been teaching for a long time.  I’ve seen new curricula, new standards, and new tests come, go, and come again.  And I know that the reality of policy-making is inextricably tied to these things.

But these things don’t really lead to the kind of authentic, sustainable change that comes from empowering teachers.  I have experienced this personally, I am witnessing it right now in my school, and through digital communities, I see it happening all over the country.

I was honored to represent teachers and talk about the positive impact these programs have had on me and my school.  But I was definitely nervous following speakers like Nancy Pelosi, Harry Reid, Al Franken, and many other politicians and policy makers!  Hopefully, my message resonated with those in attendance, and I’m thankful to the MSRI for giving me the opportunity to contribute to the conversation.

Exploring Compound Interest

Go to a <a href="http://bucks.blogs.nytimes.com/2013/01/07/investing-money-plus-lots-of-time-equals-excitement/">related post</a> about a topic one blogger calls “incredibly important to share with your kids.” »My latest piece for the New York Times Learning Network is a math lesson exploring personal savings and the power of compound interest.  The piece was inspired by a new program in Illinois that creates an automatic payroll-deduction savings program for all state residents.

In addition to exploring the basic ideas of savings and compounding, students are invited to analyze the merits of this state-run program.

The automatic retirement savings program mentioned in the article is described as a zero-fiscal-cost program because it does not require any government funding to run. This is because the savers themselves pay the costs, in the form of fees to financial institutions, amounting to 0.75 percent of their total savings each year.

Have students compute the costs associated with maintaining the account for each of the typical savers they profiled in the previous activity. One way to do this is to compute 0.75 percent of the total value of the savings account each year, before interest is computed. This is an estimate of the amount that would be paid in fees that year, and thus should be subtracted from the amount in savings.

The entire piece is freely available here.  Hopefully students will get a sense of the power and value of long-term savings, and maybe ask a few good questions about the the true price of zero-fiscal-cost programs.

New York State Master Teacher Program

NYSMTPI’m happy to announce that I am now officially a member of the New York State Master Teacher Program.

The NYSMTP is designed to connect great math and science teachers from around New York State through networking, professional development, and professional service.  The program is inspired, in part, by the Math for America Master Teacher program in New York City, which I have been actively involved in for the past 9 years.

This past summer I was fortunate to attend a NYSMTP retreat in upstate New York, and I had a fantastic time.  I talked with teachers from all over the state, and learned a great deal about the many different, and similar, things going on across New York.  I also ran a workshop on using Twitter for professional development, which I think is a natural medium for connecting teachers in a program like this.

I’m looking forward to working more with great colleagues from across New York State!

 

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