Transition to university

Elliott Fletcher on Which coin is more likely to be biased? 8 years, 4 months ago

Gave some feedback: Needs to be tested

Aiden McCall on Transformation - Reflection 8 years, 4 months ago

Gave some feedback: Needs to be tested

Elliott Fletcher commented on Theoretical Probability vs Experimental Probability 8 years, 4 months ago

I think part d) will need checking, i'm not 100% sure that it's correct.

Elliott Fletcher on Theoretical Probability vs Experimental Probability 8 years, 4 months ago

Gave some feedback: Needs to be tested

Christian Lawson-Perfect on Extract common factors of polynomials 8 years, 4 months ago

Saved a checkpoint:

I'm working on writing a script to check that the expression really are factorised. At the moment, it expects the common factor to just be a number, which only works for part a!

Christian Lawson-Perfect on Extract common factors of polynomials 8 years, 4 months ago

Gave some feedback: Has some problems

Christian Lawson-Perfect on Extract common factors of polynomials 8 years, 4 months ago

Saved a checkpoint:

Factorising by finding a common (constant) factor and factorising quadratics are very different tasks. I think the scope of this question is only the first kind.

For example, to factorise $2x + 4y + 16xy$, I only need to see that $2$, $4$ and $16$ have a factor of $2$ in common. To factorise $x^2-1$, I need to know a fact about quadratics: the terms $x^2$ and $1$ don't have a proper factor in common.

So, I'm going to split the qudratics part into a separate question, leaving only the expressions with common factors.

Christian Lawson-Perfect on Using a speed graph to find distance 8 years, 4 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Using a speed graph to find distance 8 years, 4 months ago

Saved a checkpoint:

The area under the flat bits is a rectangle, not necessarily a square!

I've tidied up the wording of the advice in some places, and made sure all the inputs have units after them.

Bradley Bush on Identifying different types of sequences 8 years, 4 months ago

Gave some feedback: Needs to be tested

Bradley Bush commented on Identifying different types of sequences 8 years, 4 months ago

Thank you for the feedback Christian:

• I have added tables to the feedback for parts a and b to make the working easier to follow.
• I have added a table to the feedback for c also to analyse the difference between terms but I have included Hannahs solution using the formula as an alternative method of solving this.
• I have altered question d to be the more generic randomisable sequence equation which you suggested.
• I attempted to explain the solution using a table here to find the differences too but I am not too sure how thoroughly this would explain the way you work out that the sequence is squared numbers and cubic numbers without simply recognising them. Nor am I confident I even know how to recommend solving this problem if you do not recognise the squared or cubic terms on your own?

Christian Lawson-Perfect on Solving linear inequalities 8 years, 4 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Solving linear inequalities 8 years, 4 months ago

Saved a checkpoint:

I reworded the advice a little bit. 

This is a good question - there's a nice progression from simple inequalities to more complicated.

Elliott Fletcher on Probability of the union of two non-mutually exclusive events 8 years, 4 months ago

Gave some feedback: Needs to be tested

Christian Lawson-Perfect on Use the quadratic formula to solve an equation in terms of an unknown variable 8 years, 4 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Use the quadratic formula to solve an equation in terms of an unknown variable 8 years, 4 months ago

Saved a checkpoint:

Looks good!

Christian Lawson-Perfect on Creating Frequency Tables 8 years, 4 months ago

Gave some feedback: Has some problems

Christian Lawson-Perfect on Creating Frequency Tables 8 years, 4 months ago

Saved a checkpoint:

The advice is pretty redundant! A list of sentences of the form "the number of students who scored X is Y" is effectively the same information as the table.

The advice should explain how to get the answer. I did it by writing rows labelled 0 to 10, and tallying as I worked through the list. How would you do it? Just describing one or two methods, and giving the correct answer, is enough.

Christian Lawson-Perfect on Using the Quadratic Formula to Solve Equations of the Form $ax^2 +bx+c=0$ 8 years, 4 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Using the Quadratic Formula to Solve Equations of the Form $ax^2 +bx+c=0$ 8 years, 4 months ago

Saved a checkpoint:

I'm not sure why part b had two equations in it. I've split it into two parts.

A couple of uses of "question" instead of "equation" in the advice.

The quadratic formula was missing $x=$ a few times in the advice!

Otherwise, this is good.