Mark Bell

I am a Mathematics coach. I love to play backgammon. T^3 Regional Instructor

[Directors’ Cup Updates @Direct_Cupdates]

Watch how the 2025-26 Learfield Directors' Cup played out.

I've condensed 9 months of athletic competition into a 30 second visualization.

What stands out to you?

[Mark Bell @mbell00]

@haroun_haifa @SpursNationCP Who cares!

[Texas Longhorns @TexasLonghorns]

a United Texas is a RECKONING 🤘

#HookEm

[Mark Bell @mbell00]

@EvanVieth @InsideTexas You forgot the swimming and soccer horses!!

[Mark Bell @mbell00]

@PareesaSchulte @mrallenmath27 @TICalculators Mr Allen is awesome!

[Pareesa Schulte @PareesaSchulte]

Come see @mrallenmath27 and all our amazing instructors at #CAMT2024 to learn all the fun ways to integrate @TICalculators

[Graciela Bell, PhD @Msschoolbell]

Math royalty right here: Dr. India White and Howie Hua! #CAMT 2024. CAMT 25 is in San Antonio! ⁦@CAMT_TX⁩

[Mark Bell @mbell00]

@TeamELPS @MarissaLiteracy @UTSAAlumni @UTSA @UTSACOEHD @UTSAGradSchool Congratulations Andrea!
Well deserved!

[Mark Bell @mbell00]

@NextRoundLive @jimdunaway @TexasBaseball @AggieBaseball You are such a loser!

[Howie Hua @howie_hua]

Teachers, what's one thing that worked in your classroom this year?

Let's help each other out.

[Mark Bell @mbell00]

@howie_hua 5+5+1=11
5 from both sides and 1 in the middle

[Jay Cummings @LongFormMath]

Here is a lovely geometric proof that sqrt(2) is irrational.

The proof begins by looking at an isosceles right triangle whose legs have length 1. By the Pythagorean theorem, this triangle's hypotenuse will have length sqrt(2).

[Mark Bell @mbell00]

@wtgowers @AbellsTheorem

[Mark Bell @mbell00]

@ergoEDU @SAISD 34 here!

[Mark Bell @mbell00]

@howie_hua So True

[Mark Bell @mbell00]

@robertsn_cindy Ordered! Thanx!

[Mark Bell @mbell00]

@asjiaoneal @PlayersTribune You are the Slide Queen as well as a Longhorn Legend!!🤘🤘🤘

[Mark Bell @mbell00]

Fun with Einstein Tiles.

[Texas Volleyball @TexasVolleyball]

A run to remember 🤘

#HookEm