Lauren Richards

Lauren Richards commented on Extract common factors of polynomials 8 years, 5 months ago

• You're missing the word factors in the first sentence of the statement. 
• It really does not like formatting like at all. My answers to part a) were marked wrong on 3 occasions because of underuse of * in between each term which wasn't required. For part b)iii), the question was to factorise 9x^2+6x. I had written "3x(3x+2)" and then "3x*(3x+2)", both of which it said was incorrect. It wanted "3*x(3x+2)". I don't think the user will immediately jump to writing "ax*(bx+c)" or "a*x(bx+c)" so if you want them to answer the question in this format, you should state so in the question. Otherwise, it can be quite demoralising when it is just marked wrong but what they have written is technically right. 
• In part a) I literally can't get it to accept my answers for love nor money. They always seem to be in the wrong form. This is either due to * not being used or the brackets being in the wrong order, for example: for the question "37xyz+31x^2y^2z^2", I wrote "x*y*z(37+31x*y*z)" which it marked as incorrect, as it wanted "x*y*z(31*x*y*z+37)". I think most students would give up and would not expel too much energy trying to get it to accept their answer in the right form. Give some guidance on the right form that it will accept or make it accept a simplified form. 
• Part a)i) gave me an incorrect expected answer. The question was to factorise: "86x+62" which I wrote as "2(43x+31)" but the expected answer was "2(43x+3)" which is wrong. It had the correct answer in the advice.  
• In your advice for part b), you need a space after b and your semi-colon should have a space after it before both and not before it.  
• In part b)i), "the only numbers fitting this description..." should be a new sentence and capitalised. The final answer should be centred. This point also applies to part b)iv), b)v) and b)vi).
• The advice for part b)ii) seems quite short. You might want to explain what the difference of two squares is and what happens to the x terms. 
• Prof should have a full stop after it. 

Lauren Richards on Substitute values into formulas 8 years, 5 months ago

Gave some feedback: Has some problems

Lauren Richards commented on Substitute values into formulas 8 years, 5 months ago

• Main parts
• You need a full stop at the end of the statement.
• You don't need a comma before the function of the curve in part a).
• I think part a) needs to be reworded a little. Maybe put the curve function first. 
• Part b) is fine.
• You don't need a comma on the first line of part c). However, there should be one after the formula. There shouldn't be one after where on the third line.
• Advice
• It should be a full stop rather than a comma after "substitute 5 into 9x^2 +3x +22." in part a). Maybe reiterate that the final answer you get is equal to the y-coordinate.
• Same comments as above for part b). A full stop and reiterate that it is the predicted number of yachts sold.
• For part c), it should be a full stop at the end of the first line. Start the next line as a new sentence with a capital letter and end that line with a full stop. Reiterate that the final answer is the temperature in fahrenheit. 
• Good questions and I like the contexts!

Lauren Richards on Probability - Notation and Conversion between Percentages, Decimals and Fractions 8 years, 5 months ago

Gave some feedback: Has some problems

Lauren Richards commented on Probability - Notation and Conversion between Percentages, Decimals and Fractions 8 years, 5 months ago

• You don't need either of the commas in the second sentence of the statement. 
• The question statement of part a) sounds like it should be the first sentence in the advice. It should just be "The probability that it will rain today is 90%."
• i) and ii) should be i) and ii) in italics in both the questions and the advice. 
• I think that the bracket after P in both i) and ii) should just say (rain) rather than (it rains today).
• Again in part b), I think it should say "The probability that the bus is late today is 0.7." rather than "You are told that the probability that your bus is late today is 0.7."
• Again in part b), I think the bracket should just say (late) rather than (Your bus is late). Also pointing out that you capitalised this bracket but didn't in part a). I don't know which one is right but you should probably keep it consistent. 
• Again in part c), I think it should say "The probability that a football match between Newcastle and Manchester ends in a draw is 1/7." Also, I think you should add United after Newcastle and United/City after Manchester (but preferably United haha) just so the context seems more realistic. 
• I would not use "just" anywhere in the advice. It is almost the same as saying "simply" which Christian hates and is a little belittling to someone who is actually finding this difficult. 
• I like all the contexts and how you switch the questions around so the user has to be able to convert to all three things! :) 

Lauren Richards on Working with standard index form 8 years, 5 months ago

Gave some feedback: Has some problems

Lauren Richards commented on Working with standard index form 8 years, 5 months ago

• In the statement, you do not need "is a way that", it reads fine and makes more sense without it. 
• I think you should say what the large number equivalent would be for the example in the statement to make it make a link for the user. They understand what large numbers are but it is difficult to deal with them, and you showing what the large number equivalent of the example standard form will help them to understand how to use it more.  
• I think you should alter the question part of a to include an example of how you would like the answer typed. I tried to type x as an * as I think many users might try, and obviously numbas didn't like that very much. If you put "Write these in standard index form (for example, a.bcd*10^n):", I think it would be clearer. 
• I think you should write "the following" instead of "these" in parts a) and b), not just part c). 
• I had a question in part d that technically did not follow the standard index form as A was not between 1 and 10. It was 81*10^2. If following the standard index form you had stated in the statement, it should have been 8.1*10^3.
• I think the advice for part c) could be expanded quite a bit, especially the first sentence. You haven't said what you mean by "convert". 
• Minor point, but I think "Similarly" in part d) advice should have a comma after it to make it look less lonely. 
• I think this is a good question!

Lauren Richards commented on Division of fractions 8 years, 5 months ago

Vicky, I have tried to change part e to be variables but struggled and it needs a bit of work still.  

It is coming out as a whole integer at the end which is correct, but some of the numbers earlier in the question are unrealistic and in some cases at the start I am also getting mixed numbers with a 0 on the numerator and can't work out how to stop that at the moment.

I worked backwards, so created mixed numbers from improper fractions but the user will start with the mixed numbers. 

Lauren Richards on Converting between Mixed Numbers and Improper Fractions 8 years, 5 months ago

Gave some feedback: Needs to be tested

Lauren Richards on Converting between Mixed Numbers and Improper Fractions 8 years, 5 months ago

Gave some feedback: Has some problems