Transition to university

Chris Graham commented on Using BODMAS to evaluate arithmetic expressions 8 years, 6 months ago

The statement begins "Apply BODMAS..." What if the student has never seen this acronym. I think I would begin with a short summary, or at least add this as a step, so that they can seek help. 

You don't need the horizontal lines in the advice. There;s nothing particularly wrong with them aesthetically, however they're inconsistent with other questions.

Try to punctuate equations in the advice as discussed yesterday.

Stanislav Duris on Square and cube numbers 8 years, 6 months ago

Gave some feedback: Needs to be tested

Chris Graham commented on Expand brackets and collect like terms 8 years, 6 months ago

I've changed the Doesn't Work status as it seems to run OK. What was the problem?

The statement is currently more of a description of the question, rather than instructions for the student. "For each of the expressions below, collect terms..." would be more direct.

In part b) you can use the string restrictions tab to set the expected variables and warn the student if they use anything other than those.

The prompt in b) starts quite abruptly with "One bag...". Why not say e.g. "Brad has two bags of tokens. The first bag contains..." I think I would move the bag contents to two lists, which is easier for the student to work with.

In the advice you have some small errors e.g. $7z(=$, and you could make use of the align environment. Similarly with part (b).

In the final part of the advice I would give an expression for each bag first, in terms of $r,b,y$ and then put the two together.

Chris Graham on Expand brackets and collect like terms 8 years, 6 months ago

Gave some feedback: Has some problems

Hannah Aldous on Factorising Quadratic Equations with $x^2$ Coefficients Greater than 1 8 years, 6 months ago

Gave some feedback: Needs to be tested

Stanislav Duris on Calculate a student discount 8 years, 6 months ago

Gave some feedback: Needs to be tested

Bradley Bush commented on Solve quadratic inequalities 8 years, 6 months ago

How do I allow either or answers for the gap in part a?

Hannah Aldous on Factorising Quadratic Equations with $x^2$ Coefficients Greater than 1 8 years, 6 months ago

Gave some feedback: Has some problems

Bradley Bush on Solving linear inequalities 8 years, 6 months ago

Gave some feedback: Needs to be tested

Hannah Aldous on Using the Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ 8 years, 6 months ago

Gave some feedback: Needs to be tested

Bradley Bush commented on Extract common factors of polynomials 8 years, 6 months ago

Could not get the except function to work because of the variables being vector so  have altered the vectors so the numbers they select their elements from are mutually exclusive. 

Bradley Bush on Extract common factors of polynomials 8 years, 6 months ago

Gave some feedback: Needs to be tested

Lauren Richards on Converting between Mixed Numbers and Improper Fractions 8 years, 6 months ago

Gave some feedback: Needs to be tested

Bradley Bush on Extract common factors of polynomials 8 years, 6 months ago

Gave some feedback: Doesn't work

Vicky Hall commented on Extract common factors of polynomials 8 years, 6 months ago

Question bii) asked me to factorise $x^2+4$ and the solution came up as $(x+2)(x-2)$. This needs to be fixed so that either the answer is 'has no real solutions and cannot be factorised' or the expression is $x^2-4$ instead.

Also, I would reword the question for b). There's no need for the student to complete the square for any of the expressions so I would just change it to say 'factorise the following expressions'.

Chris Graham commented on Factorising Quadratic Equations with $x^2$ Coefficients Greater than 1 8 years, 6 months ago

In part a), i),ii) should be in italics, and I would start a new line afterwards.

You need some string restrictions in part (a), for example I can enter the expression into the gap as given, and get full marks. See the bottom of the Numbas tutorial.

In (b) and (c) "values of x in the following equation" would be better expressed as "values of x which satisfy the following equation".

In the advice, put a),b)... on a new line, and preferably set the style using format->Formats->Headings->Heading 4

The advice is not easy to scan, and unfortunately students will not take care to read the whole thing. Help them out by placing any important equations on a new line, so that the student can easily see how the solution develops. And as a general rule, use display style for any equations on their own line.

In part (d) of the advice you obtain the possible values of x, however this is not asked in the question. Did you intend to include this? If you do so you will need to think about the precision that you would like, and formatting in the advice (see e.g. dpformat on the jme reference page).