Tom Horn

Math teacher

[Tom Horn @MathTeach_41]

Totally agree. You can literally teach students how to solve quadratics by completing the square by saying nothing and just listing a sequence of problems.

[Matt Enlow @CmonMattTHINK]

If only students knew the power of the "turn a problem you DON'T know how to solve into one that you DO know how to solve" strategy

[Tom Horn @MathTeach_41]

@pwharris @Steelemathlete Absolutely! We teach multiplying with a box (so students see that direct relationship), but I agree this provides a conceptual connection that dates all the way back to the area models that students first use to represent multiplication.

[Tom Horn @MathTeach_41]

I was just reminded by @Steelemathlete about how great polynomial division is with a box! s/o to @pwharris for sharing this with us via the GREAT book "Advanced Algebra Problem Strings!"

Book: https://t.co/dxhBzaZJt6

Video:https://t.co/j5DfIRPKmz

#mathed #mathchat

[Tom Horn @MathTeach_41]

@KentHaines Similar theorem for work ethic:
Let "n" be the number of hours I work.

Anyone who works n+1 hours is a workaholic.
Anyone who works n-1 hours is lazy.

[Tom Horn @MathTeach_41]

New video: Identifying Cross Sections
https://t.co/cUzoeDnauN

#mathchat #mathed

Really cool interactive cross sections applet from the video can be found here: https://t.co/ZwDTylKXNQ

[Tom Horn @MathTeach_41]

@bobloch Job security :)

[Tom Horn @MathTeach_41]

@cluzniak @debatemathpod I'm concerned that grades are the only "carrot" for students that aren't intrinsically motivated. How do we motivate the unmotivated without the grade? My experience is that removing the grades doesn't change this (optional practice has like 5% completion rate)

[Tom Horn @MathTeach_41]

@Steelemathlete @howie_hua Big fan of this idea as well!

[Tom Horn @MathTeach_41]

Just had a student explain to me (in great detail) how they know all the powers of 2... because of Minecraft. #mathchat #mathed

[Tom Horn @MathTeach_41]

@Steelemathlete

[Tom Horn @MathTeach_41]

@KentHaines I came across this applet a few years ago. I think it is pretty user friendly. I usually have us all walk through it together (so I can demonstrate which sliders to use and whatnot) https://t.co/ZwDTylKXNQ

[Tom Horn @MathTeach_41]

Congrats Nathan!!!!

[Northwest ISD @NorthwestISD]

Steele Early College High School student Nathan Collins will head to the Texas Capitol and U.S. Capitol this summer! Thanks to the Youth Leadership Tour program from CoServ, Nathan will represent Northwest ISD and learn more about how both the state and federal government work.

[Tom Horn @MathTeach_41]

Here's my open question! @mgriffin01 #mathed #mathchat

[Tom Horn @MathTeach_41]

@katybarrey katy this is so cheesy don't encourage this behavior. @Brit_Horn_IT

[Tom Horn @MathTeach_41]

Ok, I'm kind of proud of this video: Exterior Angle Sum
https://t.co/jf3EOsUJei

#mathed #mathchat

[Tom Horn @MathTeach_41]

@CmonMattTHINK Great question. I'd say once you've derived them (where "by hand" is useful for conceptual understanding), then go straight Desmos!

[Tom Horn @MathTeach_41]

BTW, this book is amazing and well-researched. There's a TON of great physics examples in there as well. #physics #physicsed

[Tom Horn @MathTeach_41]

Found a PERFECT Trigonometry problem while reading Project Hail Mary by @andyweirauthor

I can't decide if I should have students just draw a picture and solve, or if I should see if they can find what is incorrect about the problem.. #mathed #mathchat

https://t.co/9vgA4MCBbO

[Tom Horn @MathTeach_41]

Found a PERFECT Trigonometry problem while reading Project Hail Mary by @andyweirauthor

I can't decide if I should have students just draw a picture and solve, or if I should see if they can find what is incorrect about the problem.. #mathed #mathchat

https://t.co/9vgA4MCBbO

[Tom Horn @MathTeach_41]

New video: reference angles https://t.co/96VyMBqMEn

#mathed #mathchat

[Tom Horn @MathTeach_41]

Great conversation this morning about correlation vs causation. # of firefighters present at a fire is correlated with the amount of damage done... what can we conclude from that?

Now, to figure out why gymnasts appear to be shrinking over time....#mathchat