Joseph Espinosa

Forward thinking Los Angeles based educator passionate about innovation for the purpose of creating student-centered learning systems for teachers and students.

[Joseph Espinosa @jaespi02]

@pwharris 3/2 is 3/4 of X. 1/2 is 1/4 of that same number and so if I multiply 1/2 by 4 I get 2 which is the number.

[Joseph Espinosa @jaespi02]

@pwharris 351/9 = (270/9) + (81/9) = 30 + 9 = 39. I strategically decomposed the dividend to find the largest number I knew would be divisible by 9, 270, then the rest followed from there.

[Kareem Abdul-Jabbar @kaj33]

Today I had to say goodbye to
a great friend that I will always miss….@UCLAAthletics @UCLAMBB @NBA

[Joseph Espinosa @jaespi02]

@pwharris 7/8 of 48 = 7 * (1/8 of 48) = 7*(48/8)=7*6=42

[UCLA Water Polo @UCLAWaterPolo]

Easy as 1⃣2⃣3⃣!
We are NCAA Champions!
FINAL | No. 1 UCLA (26-0) beats No. 3 California, 7-4!
The Bruins won their 8th NCAA title and 12th National Championship!
Also the fifth time in women's water polo history (third time for UCLA) a team has won going undefeated!
#GoBruins 🐻

[Joseph Espinosa @jaespi02]

@pwharris I saw this as 1 divided by 1/49 and so I thought about it using measurement division. This allowed me to think about the problem as how many groups of 49ths are in 1 whole. That would be 49.

[Joseph Espinosa @jaespi02]

@pwharris 9 because that is 1/2 of 18 to maintain equivalent product. What is really behind this is the multiplicative inverse. Here is an investigation into this idea: https://t.co/CMkVa72Bqn

[Joseph Espinosa @jaespi02]

@pwharris 60 - 40 = 20 ; 3-9 = -6; 20 -6 = 14

[NCTM @NCTM]

Interact directly with the authors of the Proactive Mathematics Coaching book (@PiBaker18 & @KnappMelinda) with the Catalyzing Change Through Proactive Mathematics Coaching book study!

Gain access all on-demand recordings and slides when you register: https://t.co/HsfgbHXIBU

[Joseph Espinosa @jaespi02]

@pwharris 75% of 88 is 66 . 1% of 88 is 8.8. 66 + 0.88 is 66.88 So 76% of 88 is 66.88.

[Joseph Espinosa @jaespi02]

@pwharris 1/2 of 66 is 33. 1/10 of 66 is 6.6 so 1/20 is 3.3. So 33 -3.3 is 29.7.

[Joseph Espinosa @jaespi02]

@howie_hua Why steal Ts & Ss thunder with teaching this via video and with a standard algorithm setup? Why not pose 82-57 horizontally as a story problem/NT in this space & let your audience make sense of it. I’m sure this would come up because kids do this on their own when making sense.

[Joseph Espinosa @jaespi02]

@howie_hua Is the purpose of this video to teach Ts a new way, explicitly using the long division setup so they can teach their Ss this new way explicitly? I myself would pose a contextual division problem or simply 112/4 as a NT with Ts or Ss so they discover this “new way” on their own.

[Joseph Espinosa @jaespi02]

@pwharris I look at the relationships. I also think of the order in which I operate with these two factors. I can read it as 1/2 of 4/5 and half of 4 fifths is 2 fifths.

[Robert Kaplinsky @robertkaplinsky]

Are you teaching LCM? This lesson that uses buying hot dogs and buns as a context for making sense of the mathematics.
https://t.co/iMvJkbsvR0

[Joseph Espinosa @jaespi02]

@howie_hua I would add that it is equal sharing and not just sharing. We are sharing 432 using direct place value into 3 equal groups and after we are done we know each group is 144.

[Joseph Espinosa @jaespi02]

How might the following problem help you with this problem? 3/4(x)=8 See if you can solve the problem without computing? What do you notice? What do you wonder? What did you do to figure out ¾ of number is 8?

1) 1/4(x) = 8

[Alice Keeler @alicekeeler]

The best thing is for teachers is to experience doing math problems differently. @joboaler
#youcubed
@youcubed

[Scott Ellingson @mremathteacher]

3 highly recommended books from @DrKChilds at #cmcmarh North.

[UCLA Water Polo @UCLAWaterPolo]

The top-ranked Bruins were straight 🔥 today holding USC to just 2⃣ goals, the fewest in the series since 1973. An 11-2 win over the Trojans also marked the largest margin of victory in the series since 1976.