[LON-CAPA-users] online lab grading: read student data

James Sullivan lon-capa-users@mail.lon-capa.org
Thu, 13 Jul 2006 12:42:00 -0400

Thanks for the email Ray. I should probably clarify the question. Here's the
hypothetical situation:

1) Students in lab perform an experiment on gravity measuring times of free
fall for different objects from different heights.

2) From this information they should be able to determine the value of the
gravitation acceleration (and the associated error) using simple formulas.

3) What would be ideal would to have them enter the data they recorded,
let's say four different (height,time) points into LON-CAPA. A script would
then process the data and determine the "measured" value of the
gravitational acceleration. 

4) Students would enter the acceleration they have computed "by hand" as a
numerical response which LON-CAPA could then check against the value it

It seems I remember someone at the conference in MSU discussion a "data
entry" response type, in particular for lab work in physics or chemistry,
but maybe I am dreaming.


James M. Sullivan, Assistant Professor
Department of Physics                                    Virginia
Commonwealth University
tel: 804/828-6343
fax: 804/828-7073
1020 W. Main St.
PO BOX 842000
Richmond, VA 23284-2000
"If you can drive a nail, and if you have any nails to drive, drive them." 
          - H. D. Thoureau, 1850
> -----Original Message-----
> From: lon-capa-users-admin@mail.lon-capa.org [mailto:lon-capa-users-
> admin@mail.lon-capa.org] On Behalf Of batchelo@sfu.ca
> Sent: Thursday, July 13, 2006 12:28 PM
> To: lon-capa-users@mail.lon-capa.org
> Subject: Re: [LON-CAPA-users] online lab grading: read student data
> Hi Jay,
> 	I wonder how much data and of what type and for what kind of
> process.
> If you are talking about definitive (predetermined) data which will always
> be the same for a given lab group, then you would probably want to hard
> code
> it into the resources.
> On the other hand if you are talking about data which will be variable for
> individuals, perhaps experimental data that they measure, then that is
> quite
> a different matter.
> You can use
> &EXT('user.resource.resource.<partID>.<responseID>.submission','<mapalias>
> ')
> to retrieve student submissions for a particular response in a problem in
> a
> published sequence.  What you do with it in other problems in that
> sequence
> is up to you, and your cleverness with perl.
> I myself have only used this in fairly simple ways, so far.
> Such as, starting the sequence with a survey question, in which the
> students
> select which starting material they used in a organic chem synthesis
> experiment.  Some of the subsequent questions in the sequence then use
> that
> information to tailor their individual questions to match their response.
> In the above case I put a condition on the link from that first survey
> question, to prevent them from accessing the rest of the sequence until
> they
> have responded to the survey.
> If this is the kind of thing you are interested in let me know and I will
> go
> look to see if it is open source.
> I'm sure others have done other even more interesting stuff.
> Cheers,
> Ray
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