The Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Math Forum » Discussions » Education » math-teach

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: Re: Not in Boston
Replies: 28   Last Post: Apr 12, 1999 12:52 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Mark Priniski

Posts: 10
Registered: 12/6/04
Re: Manipulatives
Posted: Apr 11, 1995 8:12 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

Hi NCTMers---

>For older kids -
>When I teach trig, I give my students large unit circles on graph paper
>with a radius of ten graph units of .1 each. They approximate the
>coordinates of the points on the circle at the intersections of the radii
>at pi/6, pi/4, ... etc and write these on the circle. From then on they
>can visualize the important symmetries by referring to the circle and
>they use the circle on tests and in doing work involving trig for several
>years afterward. For these kids the unit circle is a manipulative - they
>depend on it, not for values (they have calculators for these if
>necessary) but for visualizing and understanding the nature of circular
>functions. A kid who doesn't happen to have her circle available will
>often sketch it quickly when working on a problem - which is exactly how
>I would hope she would think
>Joan Reinthaler
>Sidwell Friends School

Here is one I used this year...

My Algebra II class was having a hard time understanding radian measure,
they kept converting even the obvious angles back to degrees. The floor in
my classroom is made up of 4 foot squares. I had the students push all of
the desks to the side of the room and each stand on their own "personal
origin." After drawing a large zero in the front of the room, we spent
the hour turning angles of radian measure, complements of radian measure,
supplements of radian measure, and finding referance angles in radian

Since then, I see a lot of "body language" during tests, but they are
understanding much better. :)

Mark Priniski Pioneering Partner '93
Rib Lake High School
Rib Lake, WI 54470

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.