Transition to university

Elliott Fletcher on Straight line equation application: measuring sunflower height 8 years, 5 months ago

Gave some feedback: Has some problems

Hannah Aldous on Factorising Quadratic Equations with $x^2$ Coefficients Greater than 1 8 years, 5 months ago

Gave some feedback: Needs to be tested

Elliott Fletcher on Finding the highest common factor of two numbers 8 years, 5 months ago

Gave some feedback: Has some problems

Elliott Fletcher commented on Finding the highest common factor of two numbers 8 years, 5 months ago

I think this is a really good question and it works well. Just a few comments

Main Parts

In the statement i would write a definition of composite as well as some students might not know what this means.

a) good

b) in the question i would write "Identify which of the following are prime numbers:" instead of "Identify the prime numbers from below."

One of the numbers here for me was 43, which is a prime number, however if you say it is a prime number it is marked incorrect as the displayed answer is that it is composite.

Advice

Good job getting the list of factors thing to work!

b) you could put the numbers in the table in the order that they appear in the question but it's up to you. I would also write "composite" instead of "not prime".

Also you could extend the table a little bit to the right, so that some numbers don't go onto a new line in the divisors column.

Christian Lawson-Perfect on Calculate the areas of polygons 8 years, 5 months ago

Gave some feedback: Has some problems

Christian Lawson-Perfect on Calculate the areas of polygons 8 years, 5 months ago

Saved a checkpoint:

Why do I need to round my answer at all?

I agree with Vicky and Hannah's suggestions.

Christian Lawson-Perfect on Basic arithmetic operations: addition and subtraction 8 years, 5 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Basic arithmetic operations: addition and subtraction 8 years, 5 months ago

Saved a checkpoint:

Lovely question, but it could be split into three separate questions. In particular, I'd like to be able to submit my answers for each of the sums in part a without completing the rest.

Elliott Fletcher on Factorising Quadratic Equations with $x^2$ Coefficients Greater than 1 8 years, 5 months ago

Gave some feedback: Has some problems

Elliott Fletcher commented on Factorising Quadratic Equations with $x^2$ Coefficients Greater than 1 8 years, 5 months ago

I think the questions here are good and will be reasonably challenging for the students, there are just a few errors that i noticed.

Main Parts

a) the correct numbers that you put into the answer box are marked correct, but the expected answer comes up as somethinwe g else which would be incorrect. For example, i was given the equation 2x^2+12x+10 =0, which factorises to 2(x+5)(x+1) = 0, which is marked correct, however the expected answer comes up as 2(x+4)(x+3) = 0.

b) Here the correct answer is marked incorrect,

i had 8x^2+112x+320=0 which factorises to 8(x+10)(x+4) = 0. Thus x1 = -10 and x2=-4. However this is marked wrong and the expected answer is x1=-5 and x2= -1, which wouldn't be right.

c) good

d) i would write "in order to calculate the possible values of x that satisfy the equation" instead of "in order to calculate the possible values of x".

Again, the correct answer is marked incorrect. The expected answer shows different values which would be incorrect.

Advice

a)

I don't think you need a comma after "with" on the first line here.

I think there should be a 2 in front of the brackets in the final answer, as you have done in the question itself.

b)

I don't think you need a comma after "with" on the first line here.

I think you need a full stop after the factorised equation on the 7th line.

c)

The equation here shows the wrong coefficient of x in the second factor, for example for

6x^2+5x+1 = 0, you have

"This means our factorised equation must take the form (3x+a)(3x+b) = 0" whereas the equation should be "(3x+a)(2x+b) =0".

On that note i think it should be 3b+2a = 5 instead of 3a+2b=5.

I would put the multiplications in brackets here when you write when you multiply the values of a and b by 3 and 2.

d)

I think you should just write "we need to find two values that add together to make 5 and multiply to make 6" as one line instead of two.

Typo: "mutipy" should be "multiply"

I think this part needs more explanation for how you obtain each of the numbers for the factorised expression, something like you have done in part c)

Although the way you find the final answer does make sense and does work, i don't really see why you need to find the previously mentioned values like 3 and 2 that add and multiply to make a certain number to do this. I think you'd be better answering this question in the same way as you answered part c.

Sorry for all the feedback!

Lauren Richards on Finding the highest common factor of two numbers 8 years, 5 months ago

Gave some feedback: Needs to be tested

Christian Lawson-Perfect on Always, sometimes or never: square and cube numbers 8 years, 5 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Always, sometimes or never: square and cube numbers 8 years, 5 months ago

Saved a checkpoint:

Lovely question!

Christian Lawson-Perfect on Expansion of brackets 8 years, 5 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Expansion of brackets 8 years, 5 months ago

Saved a checkpoint:

Looks OK.

You had the expected variables set incorrectly for the last two parts. You should just give the single variable names you expect, not combinations of them. And the whole point was to give a warning when the student types xy, not allow it!

Bradley Bush on Solving linear inequalities 8 years, 5 months ago

Gave some feedback: Needs to be tested

Bradley Bush commented on Solving linear inequalities 8 years, 5 months ago

Thank you Lauren, some good points here, I've made all of these changes.

Bradley Bush on Extract common factors of polynomials 8 years, 5 months ago

Gave some feedback: Needs to be tested

Bradley Bush commented on Extract common factors of polynomials 8 years, 5 months ago

Thank you for the advice Lauren. I have made all the changes you've suggested, I hope you don't end up having to give feedback on this one for a third time.

Stanislav Duris on Complete a frequency table and find the measures of central tendency 8 years, 5 months ago

Gave some feedback: Needs to be tested