# Want a POWERPOINT writing?

Discussion in 'Mathematics' started by valed, Apr 14, 2006.

1. ### valed

I'm getting bored again

2. ### bbibblerNew commenter

Does that mean you would like a project/Challenge?

3. ### valed

Guess so!
keep it at GCSE though please

4. ### bbibblerNew commenter

As in "Which matrix transforms shape A to shape B"

My students find it one of the hardest topics at IGCSE.

I teach the unit vector method and also the generalised method of letting the required matrix be ABCD and multiplying the original matrix and forming 2 sets of sym equations.

Some of my student just memorise the list of mattrices and the functions.

5. ### bbibblerNew commenter

Just had a thought,is this in GCSE?

If not, just ignore me.

6. ### siddons_sara

How about volume of a pyramid? Trying to explain where the formula comes from is always tricky! I think you would definitely get a gold medal if you succeeded with that one! And thanks for making your materials available, some real gems there.

7. ### valed

I can do that!
Gimme a few days
Ta muchly

8. ### siddons_sara

That's fabulous, look forward to seeing the results!

9. ### siddons_sara

That's totally mint! Sorry for lapsing into teen speak but that's brilliant. I saw a pretty complicated example on NRICH with three pyramids fitting together but I think your six is much more intuitive, I like it a lot.

If it's not a trade secret, what are you using to draw your diagrams with? The one with the pyramid inside the cube looks particularly good.

Many thanks again, I only made the suggestion half jokingly but this will be really useful.

10. ### valed

Thanks but I am such a NORB!!!!!
I really must check next time!!! How embarrassing

But, I was bored....
.... and still am, actually .........

11. ### mathsteacher1953

"NO Reason Boner
Popular among thirteen year old boys.I got a NORB during gym class and had to goto the nurse for her to rub ointment on it."ps. I had forgotten that sort of proof for the pyramid. Thanks for the reminder.

12. ### valed

Oops!
Where I come from, NORB means a fool as in Nought-but-a-fool....
... you had to be there!
Apologies for any offence....

13. ### Colleen_YoungOccasional commenter

valed - just checking Algebra. Formulae - changing the subject- is that anywhere?

14. ### valed

You need one?
Unknown appearing once or twice or both?

15. ### siddons_sara

Feeling a bit of a NORB myself: Valed's definition, would definitely be worried if it was Mathsteacher1963's definition I'd only raided Maths Answers a couple of days ago and forgot to spot the pyramid volume presentation.

Congratulations on the retirement, everyone who I know who has retired from teaching looks so relaxed!

16. ### Colleen_YoungOccasional commenter

valed both please - my Year 10s need this!

17. ### valed

Any particular rush or can you defer it a week or so?
As it happens, I need to teach my year 9's this after half-term so this is my next project.
PPT will be in 3 parts: 1 = Subj once 2 = Subj twice 3 = New subj raised to a power
I'll do examples of each type, step by step. I will not be reviewing factorisation, multiplying single term over bracket ...
OK?

18. ### Colleen_YoungOccasional commenter

Sounds brilliant valed.

19. ### valed

Change Subject of Formula is now available here