There was an error loading the page.
From users who are members of Transition to university :
|Christian Lawson-Perfect||said||Ready to use||3 years, 12 months ago|
|Hannah Aldous||said||Needs to be tested||4 years ago|
|Vicky Hall||said||Has some problems||4 years ago|
|Lauren Richards||said||Has some problems||4 years, 1 month ago|
Christian Lawson-Perfect 3 years, 12 months ago
Saved a checkpoint:
I've changed the parts so:
- part a always has two negative roots
- part b always has one positive root and one negative
- part c is the difference of two squares.
I don't think there was any point in the version which had a constant on the RHS.
I've added a marking script to check that the student's answer is factorised, rather than using string restrictions.
Christian Lawson-Perfect 4 years ago
Saved a checkpoint:
You need to write a feedback message to show when the student doesn't use brackets.
I got $x^2-16$ for part b, which I'd solve by noticing it's the difference of two squares. Can you make sure the coefficient $x$ is non-zero?
I'd spin part b into its own question: first factorise, then write down the roots.
Vicky Hall 4 years ago
I think this question should be renamed to 'factorising quadratic equations with $x^2$ coefficient $1$, and your other question (Factoring quadratics with larger coefficients) should be renamed 'factorising quadratic equations with $x^2$ coefficient greater than $1$.
There should be another line in the statement that shows how to solve the equation if it factorises to $(x+m)(x+n)=0$, as you ask the student to solve in the final part of the question.
In part a), I think it's a good idea to have a difference of two squares example to get students to think about how the equation can sometimes look a bit different. However, I think this should be moved to a subpart iii), and subpart i) should have a straightforward quadratic that looks exactly like the general form $ax^2+bx+c$.
Lauren Richards 4 years, 1 month ago
- MAIN PARTS
- There is a "$" sign in the statement.
- MAYBE suggest the form to answer the question in in part a) but then again if they have read the statement, they should know which form to have it in so up to you really.
- I think you should put a full stop after the formula in part b) and then start "input" with a capital letter.
- No comma needed after "obtain" in part a)i).
- Part b is fine!
- Great question!
No variables have been defined in this question.
This variable doesn't seem to be used anywhere.
Error in variable testing condition
There's an error in the condition you specified in the Variable testing tab. Variable values can't be generated until it's fixed.
No parts have been defined in this question.
Select a part to edit.
For each combination of answer and choice, specify the number of marks to add or subtract when the student picks it.
For each combination of answer and choice, write 1 if the student should tick it, or 0 if they should leave it unticked.
Test that the marking algorithm works
Check that the marking algorithm works with different sets of variables and student answers using the interface below.
Create unit tests to save expected results and to document how the algorithm should work.
There's an error which means the marking algorithm can't run:
These variables are available within the marking algorithm.
These values are available as extra variables in the marking algorithm.
These values are available as entries in the
Click on a note's name to show or hide it. Only shown notes will be included when you create a unit test.
No unit tests have been defined. Enter an answer above, select one or more notes, and click the "Create a unit test" button.
The following tests check that the question is behaving as desired.
This test has not been run yet This test produces the expected output This test does not produce the expected output
This test is not currently producing the expected result. Fix the marking algorithm to produce the expected results detailed below or, if this test is out of date, update the test to accept the current values.
One or more notes in this test are no longer defined. If these notes are no longer needed, you should delete this test.
|This note produces the expected output||Current:||
This test has not yet been run.
In order to create a variable replacement, you must define at least one variable and one other part.
|Variable||Answer to use||Must be answered?|
The variable replacements you've chosen will cause the following variables to be regenerated each time the student submits an answer to this part:
These variables have some random elements, which means they're not guaranteed to have the same value each time the student submits an answer. You should define new variables to store the random elements, so that they remain the same each time this part is marked.
This part can't be reached by the student.
Add a "next part" reference to this part from another part.
None of the parts which can lead to this part are reachable either.
Next part options
Variable replacementsNo variable replacements have been defined for this next part option.
This part can follow on from:
This part doesn't follow on from any others.
There was an error loading this extension.
- : of
This question is used in the following exams:
- Quadratic expressions and equations by Christian Lawson-Perfect in Transition to university.
- Week 1 Teacher 1 Support Homework by Heidi Steele in Sir Isaac Newton Sixth Form Year 12 Maths 2017-18 Teacher 1.
- Nick's copy of Quadratic expressions and equations by Nick Walker in Nick's workspace.
- Quadratic expressions and equations [Randomised L4] by Matthew James Sykes in CHY1205.
- NUMBAS - Quadratics by Katy Dobson in Katy's workspace.
- Ann's copy of NUMBAS - Quadratics by Ann Smith in Ann's workspace.
- Quadratics homework by Ann Smith in Ann's workspace.
- Blathnaid's copy of Ann's copy of NUMBAS - Quadratics by Blathnaid Sheridan in Blathnaid's workspace.
- JP by Julie Crowley in JP.
- MATH1601 Quiz 3 by Blathnaid Sheridan in Blathnaid's workspace.
- test1 by Justin McGuinness in Justin's workspace.
- Numbas Lab by Katie Bullen in Katie's workspace.
- test1 by Justin McGuinness in Justin's workspace.
- Quadratics by Kevin Bohan in Kevin's workspace.
- Practice factorisation by William Bean in William's workspace.
- QuadraticEquationAndExpression by AJAY OTTA in AJAY's workspace.
- Algebra by Alan Levine in Mathtest Questions.
- test exam algebra by Jose Camarena Brenes in Jose's workspace.
- Simon's copy of Practice for year 1 by Simon Vaughan in PA1710.
- Test Exam by Cameline Nafula in Cameline's workspace.
- MEM23004A by Mykola Kyrylenko in Mykola's workspace.
- Quadratic expressions and equations by Wan Mekwi in Introduction to Calculus.
- Paul's copy of Practice for year 1 by Paul Verheyen in Paul's workspace.
- algebraQuestions by Ed Southwood in Ed's workspace.
- Factorise quadratic equations by Jean jinhua Mathias in Maths 3-2020.
- Jean jinhua's copy of Quadratic expressions and equations by Jean jinhua Mathias in Jean jinhua's workspace.
- Practice for year 1 by Simon Vaughan in PA1710.
- Solving Quadratics by Kevin Bohan in Kevin's workspace.
- Melissa's copy of Practice for year 1 by Melissa Heath in Melissa's workspace.
- Edina's copy of Quadratic expressions and equations by Edina Kurdi in Edina's workspace.
- Module 3 by Niharika Singh in Niharika's workspace.