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Re: Teaching an intro go Unit Circle - where do I start?
Posted by High School Teacher on 5/17/08
I would not bother showing the Unit Circle at this point. Exposing them to it
isn't going to mean much in 2 class periods and they'll certainly make/receive a
copy of it when they do need it for real (besides, how many kids are going to
keep it, even if it is laminated).
If you haven't done it yet, I'd teach them the special triangles (45-45-90 and
30-60-90).
If you've already done that, then teach the students Right Triangle Trig not the
Unit Circle. Show them SOHCAHTOA and how it relates to the x, x, x sqrt(2) of
the 45-45-90 and the x, x sqrt(3), 2x of the 30-60-90 triangle. Parts of this
topic can be learned in 2 days (though some students will struggle longer -
some students have difficulty distinguishing among the opposite, adjacent, and
hypotenuse once you start rotating the triangle). There are lots of websites out there on right triangle trig and sohcahtoa if you
do a google search. Good Luck & Hurrah for Summer! :) On 5/15/08, sacteach wrote:
> I teach 8th grade Geometry and we are winding down the year.
> This is the first year I've taught Geo, it's the highest
> math course at the school. In talking with the Algebra
> 2/Trig teacher at the high school, she asked that I do an
> intro to the unit circle. I have two class periods (70 min
> and 85 min) to do this.
>
> I've never taught it before and don't even know where to
> begin. I don't want to stress them out as it's just for
> exposure at this point (not graded), but I don't want to
> confuse them either. It's the last two days of class, so I
> also don't want to bog them down with a lot of work.
>
> I got a workbook from the high school teacher and found a
> couple of pages I can use. Any good websites? I obviously
> need to freshen up my understanding first :) I haven't
> taught anything past algebra in 11 years of teaching.
Posts on this thread, including this one
- Teaching an intro go Unit Circle - where do I start?, 5/15/08, by sacteach.
- Re: intro TO, not intro go :), 5/15/08, by sacteach.
- Re: Teaching an intro go Unit Circle - where do I start?, 5/17/08, by dm.
- Re: Teaching an intro go Unit Circle - where do I start?, 5/17/08, by Shelli/HS Math.
- Re: Teaching an intro go Unit Circle - I agree, 5/17/08, by Sue R.
- Re: Teaching an intro go Unit Circle - where do I start?, 5/17/08, by High School Teacher.
- Re: Unit Circle only after Special Rt Triangles and Trig, 5/18/08, by Sue R.
- Re: Unit Circle only after Special Rt Triangles and Trig, 5/18/08, by D_.
- Re: Unit Circle only after Special Rt Triangles and Trig, 5/21/08, by sacteach/OP.
- Re: Unit Circle only after Special Rt Triangles and Trig, 5/21/08, by sacteach/OP.
- Re: Unit Circle only after Special Rt Triangles and Trig, 5/21/08, by High School Teacher.
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