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Checkpoint description

Describe what's changed since the last checkpoint.

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Christian Lawson-Perfect 2 years, 4 months ago

Gave some feedback: Ready to use

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Christian Lawson-Perfect 2 years, 4 months ago

Saved a checkpoint:

I've done a lot of rewording, and added random names.

Restore this checkpoint

Elliott Fletcher 2 years, 4 months ago

Published this.

Elliott Fletcher 2 years, 4 months ago

Gave some feedback: Needs to be tested

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Chris Graham 2 years, 4 months ago

Elliott, since you've been working on this one already, can we add a step with the equation for an arithmetic sequence and gaps for the first value and difference. In addition, let's put everything before "How many customers..." into the statement.

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Chris Graham 2 years, 4 months ago

Gave some feedback: Has some problems

Elliott Fletcher 2 years, 4 months ago

I have mentioned that ticket number 1 recieves strawberry ice cream in the question statement.

Elliott Fletcher 2 years, 4 months ago

Gave some feedback: Needs to be tested

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Chris Graham 2 years, 4 months ago

Yes please Elliott

Elliott Fletcher 2 years, 4 months ago

Do you want me to edit this question as well Chris?

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Chris Graham 2 years, 4 months ago

The advice assumes that the student knows that ticket number 1 receives strawberry ice cream. That works out OK, but perhaps this should be stated explicitly in the statement. 

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Chris Graham 2 years, 4 months ago

Gave some feedback: Has some problems

Aiden McCall 2 years, 4 months ago

I have added advice to the question. 

Aiden McCall 2 years, 4 months ago

Gave some feedback: Needs to be tested

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Christian Lawson-Perfect 2 years, 4 months ago

Saved a checkpoint:

I've split the parts into separate questions, since they're unrelated.

This leaves the ice cream shop question, and it needs new advice.

Restore this checkpoint

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Christian Lawson-Perfect 2 years, 4 months ago

Gave some feedback: Has some problems

Hannah Aldous 2 years, 5 months ago

Gave some feedback: Needs to be tested

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Christian Lawson-Perfect 2 years, 5 months ago

Gave some feedback: Has some problems

Picture of Christian Lawson-Perfect

Christian Lawson-Perfect 2 years, 5 months ago

Saved a checkpoint:

Part d should follow on from c, using the same sequence, and only ask for one (large) term. As it is, I've got to work out the formula for two new sequences and only get marked on the final answer.

Has something gone awry with the ice cream question? Jenny's friends both have tickets with larger numbers than hers. How does that help work out how many people got strawberry before Jenny? Unless you don't want to say explicitly how many flavours there are, that information is sort of a red herring.

Restore this checkpoint

Hannah Aldous 2 years, 5 months ago

Gave some feedback: Needs to be tested

Lauren Richards 2 years, 5 months ago

Gave some feedback: Has some problems

Lauren Richards 2 years, 5 months ago

  • Typo in part b) - it says sequeces instead of sequences. Also, I think you should separate the different questions in part a) and part b) by i) and ii). 
  • i) in part c) should be in italics and the writing for the question should be on the line underneath it. I would say the sentences coming after the i) should be capitalised, too. You're missing full stops at the end of the sentences in part c). 
  • Is part c)ii) necessary? I'm not sure that it is particularly clear and don't think it is testing anything of importance. 
  • The sequence I got given in part d) was exactly the same as the sequence I got in part c). Is it randomised? Is there a way of making sure you don't get the same sequence? I think I would put part d) as an extension of part c) and get rid of c)ii). 
  • part e) - not sure that I would say "cycles through" - I think "alternates between sequentially" might be better. 
  • For part c) in the advice, you have said "We can use the formula to find the 6 term." but in the parts you have managed to formulate it so it says "6th term". Also, maybe at the end of c)ii) advice, reiterate that the answer you get is the value of the 6th term. 
  • I would definitely make part d)i) to be another section of part c) if the sequence is supposed to be the same. 
  • I don't think the middle section of the advice for part e) is particularly clear. In the question, I actually don't think I would tell them how many flavours there are, I thinl that should be part of the question. 
  • There is a typo in the advice for part e) - it says "are" instead of "our". 
  • I think part a) and b) should be swapped around. For a) they need to know how to calculate the common difference and then use that to generate values but in b) they only need to calculate common differences, which is less difficult. 
  • I do really like this question, and particularly part e). 

Hannah Aldous 2 years, 5 months ago

Gave some feedback: Needs to be tested

Picture of Christian Lawson-Perfect

Christian Lawson-Perfect 2 years, 5 months ago

Gave some feedback: Has some problems

Picture of Christian Lawson-Perfect

Christian Lawson-Perfect 2 years, 5 months ago

In part c, I'd ask the student to give an expression for $a_n$ in terms of $n$ before getting them to compute a value. (Or, ask for $a_n$ at a particular small $n$ to check they've got the correspondence right, then ask for an expression, then calculate $a_n$ for a given big $n$)

Part d smells a lot like a fake context. Suppose you're Jenny, and you want to know how many other customers have had the strawberry ice cream before you. What information do you have? You wouldn't be told "the 1st, 6th, 11th, ... customers receive strawberry". You'd either be told "there are five flavours, and the shops cycles through them", or you'd notice that people 5 and 10 places in front of you in the queue also got strawberry. You also need to give a reason for Jenny to know which number customer she is. 

Maybe turn it around slightly: Jenny counts $x$ people buy ice creams before her, and the people $y$ and $y+a$ places in front of her got strawberry. How many people were given strawberry before Jenny?

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Christian Lawson-Perfect 2 years, 5 months ago

Before I even look at this question: never say "basic"!!!

Hannah Aldous 2 years, 5 months ago

Gave some feedback: Needs to be tested

Hannah Aldous 2 years, 5 months ago

Gave some feedback: Has some problems

Picture of Bradley Bush

Bradley Bush 2 years, 5 months ago

Great question, I only have a few really pedantic points.

For part b) of the advice, I might add a another step for 2d=\simpifly{variable 1}{variable 2} into the  solution so that you aren't jumping two lines of algebra.

With the equation punctuation in the advice, I'm not sure you are treating every equation like part of a sentence.

Your last line of advice reads "..she is the 31th person", maybe either reword your question so this doesn't happen, remove variables that wont fit the current sentence or alter the "th" to be a variable dependant on the number before it to solve this.

Hannah Aldous 2 years, 5 months ago

Gave some feedback: Needs to be tested

Hannah Aldous 2 years, 5 months ago

Created this.
Name Status Author Last Modified
Arithmetic sequences in an ice cream shop Ready to use Hannah Aldous 20/11/2019 14:36
Compute the partial sum of an arithmetic sequence Ready to use Hannah Aldous 20/11/2019 14:36
Finding the $n^{\text{th}}$ Term of a Quadratic Sequence Ready to use Hannah Aldous 20/11/2019 14:39
Identifying different types of sequences Ready to use Hannah Aldous 20/11/2019 14:40
Finding the formula for the $n^{\text{th}}$ term of linear sequences Ready to use Hannah Aldous 20/11/2019 14:39
Partial sum of an arithmetic sequence - birthday money Ready to use Hannah Aldous 20/11/2019 14:41
Find common difference in arithmetic sequences with gaps Ready to use Christian Lawson-Perfect 20/11/2019 14:39
Fill in the gaps in an arithmetic sequence Ready to use Christian Lawson-Perfect 20/11/2019 14:39
Write down and apply the formula for an arithmetic sequence. Ready to use Christian Lawson-Perfect 20/11/2019 14:46
Finding the Formula for the $n^{\text{th}}$ Term of Linear Sequences draft Chris Graham 20/07/2017 15:08
Inbbavathie's copy of Find common difference in arithmetic sequences with gaps draft Inbbavathie Ravi 24/07/2017 03:48
Find a particular term of a sequence using the given formula Ready to use Christian Lawson-Perfect 20/11/2019 14:38
Johan's copy of Write down and apply the formula for an arithmetic sequence. Has some problems Johan Maertens 02/08/2017 17:51
Finding the formula for the $n^{\text{th}}$ term of linear sequences draft steve kilgallon 19/11/2017 08:09
Compute the partial sum of an arithmetic sequence draft steve kilgallon 19/11/2017 08:11
Identifying different types of sequences draft Luis Hernandez 31/12/2018 01:38
Calcular la suma parcial de una sucesión aritmética Ready to use Luis Hernandez 14/01/2019 17:37
Identificando diferentes tipos de secuencias Ready to use Luis Hernandez 14/01/2019 13:19
Suma parcial de una secuencia aritmética - Cumpleaños Ready to use Luis Hernandez 14/01/2019 19:01
Encontrar la diferencia común en una Secuencia Aritmética Ready to use Luis Hernandez 14/01/2019 17:40
Encuentra un término particular de una secuencia usando la fórmula dada Ready to use Luis Hernandez 14/01/2019 17:48
Encontrar la fórmula para el término $n^{\text {th}}$ de una secuencia lineal Ready to use Luis Hernandez 14/01/2019 19:29
Simon's copy of Write down and apply the formula for an arithmetic sequence. draft Simon Thomas 25/02/2019 10:20
Simon's copy of Find common difference in arithmetic sequences with gaps draft Simon Thomas 25/02/2019 10:24
Simon's copy of Finding the formula for the $n^{\text{th}}$ term of linear sequences draft Simon Thomas 25/02/2019 10:30
Identifying different types of sequences draft Xiaodan Leng 10/07/2019 21:48
Write down and apply the formula for an arithmetic sequence. draft Xiaodan Leng 11/07/2019 01:48
Fill in the gaps in an arithmetic sequence draft Xiaodan Leng 11/07/2019 01:48
Find common difference in arithmetic sequences with gaps draft Xiaodan Leng 11/07/2019 01:49
Compute the partial sum of an arithmetic sequence draft Xiaodan Leng 11/07/2019 01:51
Partial sum of an arithmetic sequence - birthday money draft Xiaodan Leng 11/07/2019 01:54
Arithmetic sequences in an ice cream shop draft Xiaodan Leng 11/07/2019 01:55
Finding the formula for the $n^{\text{th}}$ term of linear sequences draft Xiaodan Leng 11/07/2019 01:55
Find a particular term of a sequence using the given formula draft Xiaodan Leng 11/07/2019 01:56
Finding the $n^{\text{th}}$ Term of a Quadratic Sequence draft Xiaodan Leng 11/07/2019 01:57
Paul's copy of Inbbavathie's copy of Find common difference in arithmetic sequences with gaps draft Paul Verheyen 05/10/2019 09:39

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