Son's teacher needs to go back to school

claire16c

i always remember it as the pointy bit - so the smallest bit of the arrow - points at the smallest number.

so yes you are right and the teacher is wrong.

i agree with skylight, as 31 is not mentioned. But not the rest.

Ive got it the other way round as surely >30 means greater than 30.

So odd numbers bigger than 30 in the right circle.
Even numbers less than 30 in the left circle.
Even numbers greater than 30 in the middle.
anything else goes outside.

browneyedbazzi

Gavin83 wrote: »

Yep >30 means 'more than' 30 so the teacher is wrong. Great news for your sons education.

There are a few rubbish teachers about (plenty of good ones too of course!)

When I was 12 I taught my maths teacher how to do long division because she couldn't figure it out. She asked me to stay late one day to show her!

Valli

and the bit outside the Venn diagram circles (did the teacher get that bit right?) is the Universal set.

halibut2209

skylight wrote: »

As there isn't a 30 or 31 then there is no confusion there.
In the center should be 20, 10, 28 - in the centre go those even and less than 30 numbers.
To the left should be 32, 46, 50, 65, 80 and 48 Even Numbers - all go in this circle
In the right should be 25, 23, 5, 29, 1 - less than 30 - all go in this circle

Nothing should be outside the sets.

Interesting as that's what the teacher said. Why do you say ">30" means "less than 30"? (Genuine question)


EDIT:

On the left is 20 10 18
In the middle is 32 46 50 80 48
On the right is 35 65
Outside both circles is 25 23 5 29 1

blue_monkey_2

On our homework there was a question - a bag of 10 apples costs 70p - what is the cost of one orange. LOL.

skylight

halibut2209 wrote: »

Interesting as that's what the teacher said. Why do you say ">30" means "less than 30"? (Genuine question)


EDIT:

On the left is 20 10 18
In the middle is 32 46 50 80 48
On the right is 35 65
Outside both circles is 25 23 5 29 1

http://www.mathsisfun.com/equal-less-greater.html

Cant explain very well, really rubbish at that but that link should help explain it - and spotted my error on the 65 and completely missed 35 to start with! Miss Rush I need to call myself.


It doesn't ask for even or odd numbers on the right hand circle though - just all numbers under 30. The left circle doesn't ask for more or less than 30, just all even numbers.

meritaten

ells bells - I am number dyslexic and until my lovely college maths teacher sorted it out for me wouldnt have had a clue!
but that teacher needs to go back to school! she is definately wrong!
I dont know what chunking is either - but it sounds rather like something people could get arrested for!

is it just me - or are modern ways of teaching basic arithmetic/maths unnecessarily complicated? my poor ADHD gd was completely befuddled when adding ten to a number from 1 to 9 - until I taught her how to play 21s (or in HER case 11s) at cards! we played the other day and she took great delight in telling her twin (who is supposed to be the math genius) 'its easy to do - cos 10 and 6 are ALWAYS sixteen!' when her twin counted the pips on the card!

*max*

On the right: odd numbers bigger than 30 (ie 35, 65)
On the left: even numbers smaller than 30 (ie 20, 10, 28)
In the middle: even numbers bigger than 30 (ie 32, 46, 50, 80, 48)
Outside the circles: odd numbers smaller than 30. (ie 25, 23, 5, 29, 1)

chocdonuty

dont know where people are getting odd numbers from, they aren't even mentioned!

balletshoes

they'll have given that worksheet out to the class, complete with wrong symbol ("greater than" symbol rather than what was meant, "less than") then the teacher will have just looked at her corresponding answer sheet.
Very confusing for the children, I've had it once with my DD and her homework sheet. When the teacher realised what had happened, she apologised to her whole class, and to any of us parents she saw at the school doors at the end of the school day too.