Randomised e-quiz development

Automatically marked maths e-quizzes for Chemists and Biochemists

Week 4

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Managed to solve one issue involving getting ridiculous looking numbers. Uploaded the question onto moodle. Came across another issue when looking at another question where i am trying to input a large equation. I can convert the file into an XML now, however moodle doesnt like it very much and so i cant import it.

Started a new question involving Kw. Very simple and should have been completed easily however the xml file created shows NA as the answer. I expect this is because the value of Kw (1×10^-14) which is used in the randomizing question bit to find the answer, is simply too small. This is very frustrating if its the case, chemistry does after all have a tendency to use very large or very small numbers. PHP should be able to work with them if we are to continue using it.

 

Statistics for Biochemists

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Began work on creating a few questions on descriptive statistics, to aid students taking the 1st year statistics course. Successfully wrote & tested functions to calculate the mean, variance, SD, SE, and coefficient of variation on an arbitrary population. This should allow for questions to be written next week without too much effort.

Creating realistic population data may be problematic as the rand() function in PHP returns numbers on a uniform distribution rather than a normal distribution - this will require some further research.

23/10/13 session

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Today I continued working on the differentiation question trying to find a code for multiple boxes for separate integers in the answer as oppose to one long answer to the question. I was unable to successfully complete this in the session .

 

Week 3

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Wrote a very simple population genetics question, and equally simple mole/% calculations on saponification and esterification

 

Week 3

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Wrote code for questions regarding Gibbs free energy, altering the code to generate questions asking for either free energy, enthalpy or entropy, requiring the user to rearrange the equation.

 

Beer-Lambert

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Started work on some questions based on the Beer-Lambert law, and ran into a bit of trouble with floating point precision that meant rephrasing the question. Successfully prototyped one question.

 

Week 2

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In this session, I used my unit conversion quiz from the previous session to code two different randomised questions, while learning how to type superscript in php and inserting ASCII code for symbols.

 

Week 2

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Successfully made another maths problem with the other biochemists. I also worked on a more generic way of creating moodle XML, which should make generating problems in future a lot easier, and significantly improve code readability.

 

16/10/2013 Session

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In today's session we worked on a 'house painter' question to produce a randomised question bank on moodle for the style of the question. I then moved on to work on a simple differentiation question that could be useful to students that have not studied A level maths and are unware of basic differentiation techniques. I will continue with this in the next session.