David Marain

Retired Math Educator/Blogger/Math Consultant/Math Assessment Specialist; I also have a problem with crimes against humanity

[David Marain @dmarain]

@Mets I just figured out the formula for the Mets to win the rest of their games. All they have to do is score 4 runs and the pitching has to hold the opposition to 3. Should I pass this along to the manager?😁😂

[David Marain @dmarain]

@Bella_91m7u Gee, can I add parentheses wherever I want!

[David Marain @dmarain]

@KarenCampe
@MatildaSpicer
@sonukg4india
@mATH_e_matics
@RaminKhosravi4
@DonFraser9
@MrValencia24
@dment37
@jamestanton
@asitnof
@scodiu
@nctm
@maanow
@RonySarker71

[David Marain @dmarain]

THREE-SEC CHALLENGE 😁

[David Marain @dmarain]

@Eman5695 Thanks for finding my cane!😁

[David Marain @dmarain]

@TirthNath Check to see if you divided by two to get the semicircle area

[David Marain @dmarain]

@KarenCampe
@MatildaSpicer
@sonukg4india
@mATH_e_matics
@RaminKhosravi4
@DonFraser9
@MrValencia24
@dment37
@jamestanton
@asitnof
@scodiu
@nctm
@maanow
@RonySarker71

[David Marain @dmarain]

@steph_bernard69 Thank you, Stéphane😊

[David Marain @dmarain]

@Mets @JuanSoto25_ I just had a dream that the Mets will go undefeated for the rest of the season if the season is canceled today😊

[David Marain @dmarain]

Let me know if you think this could be an activity for Alg1 students. Of course I don’t expect a response!
@KarenCampe @MatildaSpicer
@sonukg4india
@mATH_e_matics @RaminKhosravi4 @DonFraser9 @MrValencia24
@dment37 @jamestanton @asitnof @scodiu @nctm @maanow @RonySarker71

[David Marain @dmarain]

How many such squares can be inscribed vs how many equilateral triangles??

@KarenCampe @MatildaSpicer
@sonukg4india
@mATH_e_matics @RaminKhosravi4 @DonFraser9 @MrValencia24
@dment37 @jamestanton @asitnof @scodiu @nctm @maanow @RonySarker71

[David Marain @dmarain]

@KarenCampe @MatildaSpicer
@sonukg4india
@mATH_e_matics @RaminKhosravi4 @DonFraser9 @MrValencia24
@dment37 @jamestanton @asitnof @scodiu @nctm @maanow @RonySarker71

[David Marain @dmarain]

PREALG/ALG1

How might your students respond to the following and do you see any value to this kind of mental math question?

Explain why 53×47 is 40 more than 57×43 without calculating either product?

[David Marain @dmarain]

@mariana057 I was very happy to read that I can now buy a gluten-free mattress. Made by https://t.co/P8VhvoJfEO

[David Marain @dmarain]

Would you extend this exploration to higher differences and then analyze using algebra?

@KarenCampe @MatildaSpicer
@sonukg4india
@mATH_e_matics @RaminKhosravi4 @DonFraser9 @MrValencia24
@dment37 @jamestanton @asitnof @scodiu @nctm @maanow @RonySarker71

[David Marain @dmarain]

AN EXPLORATION FOR STUDENTS

[David Marain @dmarain]

@KarenCampe @MatildaSpicer
@sonukg4india
@mATH_e_matics @RaminKhosravi4 @DonFraser9 @MrValencia24
@dment37 @jamestanton @asitnof @scodiu @nctm @maanow @RonySarker71