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Math Teachers Chatboard

Neat result involving tangent of 999...9 degrees

by math passerby

Jul 31, 2012

I don't believe I've ever started a thread here, but since I was here a few moments ago replying to someone else, I thought I'd toss out a neat trig. result that could easily be worked into a trig. or precalculus class as an application of the sine angle subtraction formula.

Problem. Show that the following are all equal to each other: ...See More

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math passerby On 7/31/12, math passerby wrote: > Problem. Show that the following are all equal to each > other: > > tan(99 degrees), > tan(999 degrees), > tan(9999 degrees), > tan(99999 degrees), etc.

There is an easier way to show this than the way I suggested earlier.

999 = 900 + 99 = 5(180) + 99,

9999 = 9000 + ...See More

Jul 31, 2012

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Manipulatives

by Most Basic Question

Jul 31, 2012

I went into my room where the teacher before me had been for years and there was a huge gray plastic tote full of manipulatives! I'm only going to have 12 students in k-2 and I'm pretty sure that I won't need all those! What and how much of each to you suggest I keep. Here is a sample of what I saw: Hundreds of unifix cubes Hundreds of things simil...See More

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ok I had the same problem in middle school, but instead of a grey plastic tote the stuff (going back about 30 years) filled all six cabinets in the room.

1) I don't know K, but I'd say keep more than you think you will need. Will you always have 12 kids? How about 24-30 in 1st or 2nd grade if you get moved?

2) What are your going to ...See More

Aug 1, 2012

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Common Core

by Mike

Aug 5, 2012

Does anyone know if NY State has published any books/materials for the new Common Core Standards? I had heard that publishers were throwing nonsense out there for months but NY State was advising not to buy them because the "real" materials would not be out until July/August.

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Flipped Classroom. Link to past discussion on this topic

by Teachers.Net Gazette compiled past posts on Flipped Classrm

Aug 7, 2012

Click below to read what teachers said about the Flipped Classroom. Please share the article!

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Gr. 2 teachers listed their favorite math manipulatives LOOK

by Teachers.Net Gazette - by teachers, for teachers

Aug 11, 2012

Teachers like you shared their favorite math manipulatives. click below to read what they said.

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Mathalism

by PedagoNet

Aug 12, 2012

Start off your math class with a lille math mentalism!

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NEW math resource for precalculus, algebra1, apstatistics

by peter

Aug 14, 2012

Dear fellow math teachers,

[link removed].

I know some of you have been patiently waiting 'till the countdown is over. I am happy to announce that after many sleepless nights, our website is now running.

I developed [link removed]).

I really hope that through this website, I could extend my collection of math...See More

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Degree requirements

by Todd

Aug 16, 2012

Hi all - I'm hoping some of the current math & computer science teachers can give me some good advice. I originally started my degree in 1990 at Lenoir-Rhyne University in NC. I started out with a Math & Physics dual major and completeed Calc 2 and Physics 2 honors before I became lazy and switched majors. To make a long story short, I swit...See More

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Todd Thank you all very much for the input - I certainly appreciate it!

I know what you mean about teachers who simply want a job. Observing how my son has been taught math (rather poorly) has re-ignited my passion for it. I have had to undo some his teachers' damage over the years, as many seem to only teach the 'how' and not the 'why'. They ...See More

Aug 20, 2012

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Math Teach So, you DO want to major in math. I had you figured for one of those others sneaking in through the back door. Math degree IS the way to go.

Yes, there are a LOT of online resources available. Have you checked out MIT's opencourseware? They have videotaped courses on Linear (Matrix) Algebra, Diffy-Qs and the Calculus. There is even a free ...See MoreSo, you DO want to major in math. I had you figured for one of those others sneaking in through the back door. Math degree IS the way to go.

Yes, there are a LOT of online resources available. Have you checked out MIT's opencourseware? They have videotaped courses on Linear (Matrix) Algebra, Diffy-Qs and the Calculus. There is even a free book on the Calculus available for download (it's written by Gilbert Strang, the Lin Alg prof).

Other schools have video courses as well (UC Stanford, for ex.)

On 8/20/12, Todd wrote: > > Thank you all very much for the input - I certainly appreciate > it! > > I know what you mean about teachers who simply want a job. > Observing how my son has been taught math (rather poorly) has > re-ignited my passion for it. I have had to undo some his > teachers' damage over the years, as many seem to only teach > the 'how' and not the 'why'. They were teaching him to plug > numbers into a formula without teaching why the formula exists > in the first place. > > Growing up on the Space Coast of Florida with plenty of > engineers and NASA workers, I was lucky to have fantastic > teachers throughout my childhood...people with a real passion > and excitement for math and science who truly cared and knew > how to prepare us for the next 5 years of study (as one of you > emphasized). > > When it comes to continuing my major in mathematics, I'm > worried that picking up where I left off might be extremely > difficult, if not impossible, since I took Calc 2 back in > 1991. Any advice on that? Most colleges will not allow you > to re-take the same courses. > > > On 8/16/12, Todd wrote: >> Hi all - I'm hoping some of the current math & computer >> science teachers can give me some good advice. I originally >> started my degree in 1990 at Lenoir-Rhyne University in NC. >> I started out with a Math & Physics dual major and >> completeed Calc 2 and Physics 2 honors before I became lazy >> and switched majors. To make a long story short, I switched >> majors numerous times, ended up joining the Army, and here >> I am 19 years later...still 18 credits shy of my degree. I >> have plenty of time to finish before retiring from the >> military. My question is this: With a goal of teaching >> middle or high school math, physics, and/or computer >> science when I get out of the Army, would it be viable to >> go ahead and consolidate my various courses into a BS in >> Liberal Studies? If not, would a degree in computer science >> be preferable?

Aug 20, 2012

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Algebra I

by Daniel

Aug 19, 2012

Hi I was just wondering if I need a Graphing Calculator for class.... I'm going to take Algebra 1 Accelerated in 7th grade... About Algebra 1 chapter 7...

Thank You!

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