Continuities

Entries from October 2008

Wondering

October 31, 2008 · 4 Comments

Things about which I’ve been wondering lately:

I thought year two would be less exhausting than year one. It seems I was wrong. I know there will always be new preps, new students, new challenges, … but will I ever not be tired? How in the world do people who have children do this and do it well?

I recently began a master’s program. Our cohort meets one to two times a week for four hours a session (this along with homework and studying for tests is undoubtedly a contributing factor to my being tired). How do other professions handle continuing education? Is it up to the individual to do on their own time?

When I conduct PD sessions, I try to model how I run my classes. I have a variety of activities. There is time for individual work, small group work, and whole group discussions. I see very little of this in the courses I’m taking. Which is interesting, as they are courses designed for high school math teachers. What messages are relayed to the students (who are all teachers) about how we should teach?

Conversations are important. Conversations about goals and change are vital. However, at some point conversations are not enough. When is it okay to say “This situation is not working for me. I can’t settle for good enough. I want great.” and walk away?

Categories: General

Using the tools

October 12, 2008 · 16 Comments

What does it mean to be good at math? This is something I’ve been musing over for some time now.

I used to think that someone who was good at math was someone who could solve many different types of problems. By hand. The long way. The way I was taught to do it.

I’m not too sure anymore. There are tools available that help us solve equations. That let us solve by graphing. That let us solve with CAS. Why isn’t it okay to use these to get beyond the symbolic manipulation that often frustrates students? Why isn’t it okay to use the tools that let them get to the real problem solving?

Is solving for x the real skill we’re trying to teach?

If a student can read a word problem, understand what it is asking, set up equations to model the situation, use a graphing calculator to get the solutions, and evaluate the reasonableness of the solution why isn’t that enough? For the “average” student, does it matter if they say the answers are \frac{2 \pm\; \sqrt{5}}{3} or if they say approximately 1.412 and -0.079?

If a student can solve a problem by hand and get the answer of 2 \pm \sqrt{50} is that not enough? Why is 2 \pm 5\sqrt{2} a better answer?

I want my students to understand the relationship between the graph, the table, the equation, and the situation. I want my students to be able to explain and defend their answers. I want them to be able to evaluate the reasonableness of the solutions proposed by others.

There are tools that let more students have access to these ideas. Why do we insist they do it by hand?

Categories: General
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