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How many kindergarten teachers are there in USA?

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Population of US = 300 Mn

Assumption that 1/4 is population between 0 and 18 (based on a research report I read) = 75 Mn

Assuming these are equally spread across ages 0 to 18, 0 to 6 has 25 Mn kids, or roughtly 4 Mn kids / age ( 1 year band applicable for KG)

For every 25 kids there are 2 teachers typically and to account for all other suporting teachers, adding 1 so 3 teachers for every 25 kids ==> 12 teachers for every 100 Kids. =  4,000,000/100 * 12 = 480,000 = .48 Mn teachers.

As there are typically two sessions - morning and evening in a KG day of only 3 hours, half the number of teachers is sufficient. = .24 Mn teachers.
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The population of USA is around 300 Million

People generally live upto 75 years.

If we take equal distribution of all ages we get 4 million people in each age (1 to 75)

kindergarten is for kids with age less than 6  and more than 2 years  hence total 4*4 million  = 16 million

Each of the kindergarten may be operating in 2 shifts (morning and afternoon)

we will assume equal distribution of kindergarteners in morning and evening shifts

hence 8 million each.

each batch may be around 20 kids (as kids need more attention)

hence 8 million / 20 = .4 million

hence .4 million teachers.
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In the above explanation, the assumption is that pre-k,TK and K is all combined. If truly we want to focus on just K, then the addressable market is 4 MM. Other assumption is that all kids in age group of 5 attend K. with these, the new calculation would be 4MM/20 = 200K teachers
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Assumption:

  1. I’m going to take into account only kindergarten teachers that haven’t retired.

  2. A teacher works only a single shift a day.

 

The equation:
# of kindergarten teachers in the USA = [1+% Unemployed kindergarten teachers in the US] X [# of USA kids in the ages for kindergarten that goes to kindergarten] / [average # of kindergarten kids a kindergarten teacher handles a day]

 

Calculation:

 

[# of USA kids in the ages for kindergarten that goes to kindergarten]

Assumptions:

Sub equation = [# of USA kids in the ages for kindergarten that goes to kindergarten] = [# of kids in the age of kindergarten go to kindergarten] X [% of kids in the age of kindergarten go to kindergarten]

  • US populations = 330M.

  • 95% of kids in the age of kindergarten go to kindergarten.

  • Average lifespan 80 years.

  • Age of kindergarten = 2-6.5 years old (4.5 years)

  • If the age distribution was uniform, the number of children was = 4.5/80 X 330M=18.7M. However, I assume that the distribution isn’t uniform, and there are more young children in the US than older people, so I’ll round it up to 20M kindergarten kids in the US.

[# of USA kids in the ages for kindergarten that goes to kindergarten] = 20M X 95% = 19M

 

[average # of kindergarten kids a kindergarten teacher handles a day]

Assumptions:

Sub equation=  [average # of kindergarten kids a kindergarten teacher handles a day] = [average ratio of kids per teacher] X [actual capacity %]

  • Not all kindergartens are fully occupied; I assume they are 90% full.

  • The average ratio of kids per teacher is 1:20.

 [average # of kindergarten kids a kindergarten teacher handles a day] = 20 X 0.9 = 18 kids a day.

 

 

[1+% Unemployed kindergarten teachers in the US]

Assumptions:

  • The distribution of kindergarten teachers in the US is not fully efficient, so there might be unemployment of teachers from time to time.

  • In addition, sometimes teachers can be sick or take days off.

  • Therefore, I assume that an additional 10% of teachers are not working.

 

Final Calculation:

 

# of kindergarten teachers in the USA = 1.1% X 19M / 18 = 1.16M.

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Clarifications:

There are helper teachers for K teachers. I will not be including those helper teachers.

My calculations include active teachers and not retired teachers.

Calculations:

Total K teachers in USA  =  Total K students / No. of students served by 1 teacher

Looking at some of the schools in CA, there are approximately 15 kids per kindergarten teacher.

Total K students:

Avg life of a person is 80 years. 300 M US population. So approximately 3.8 M people for each age.

K teachers  = 3.8M  /  15

            = .253M teachers  ~ 250K teachers
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Total # of Kids gong to Kindergarten * (Teacher to Student ratio in one kindergarten)

Total US Population=320 Million

Assume 10% being Kindergarten age.

Total # of kids= 32 Million

Assume 50% go to school and rest don't.

Total # of Kids gong to Kindergarten=16 Million

Assume Teacher to student ration =1/8

16 Million * 1/8= 2 Million Teachers.
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kindergarten teachers in US = 1. # kindergarteners in US divded by 2. # of kids in a class

1. # of kindergarteners in US = 300 million people in the US, let's assume the population is evenly distributed by children, adults, senior, so 100 million children. out of 100 million, let's assume 15% are kindergarteners. 
15 million kindergarteners in US. 
 
let's assume there's 30 kids in each class. 30 classes * 30 kids = 900 students in a school 
 
If there are 15 million kindergarteners in the US, divide that by 30 kids in a class = 500,000
 
There are roughly 500,000 kindergarten teachers in the US. 
 
 
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