Hi Carl, No rush. I had to go with a paper homework for now, and plan to revisit the question this summer. I look forward to hearing your advice when you have the time. Thank you.
Best regards, Gene L. Harding, PE Associate Professor of ECET 574-520-4190 Purdue University-South Bend From: lon-capa-users-boun...@mail.lon-capa.org [mailto:lon-capa-users-boun...@mail.lon-capa.org] On Behalf Of Carl Lira Sent: Wednesday, January 25, 2017 11:00 AM To: 'Discussion list for LON-CAPA users' <lon-capa-users@mail.lon-capa.org> Subject: Re: [LON-CAPA-users] Function Plot Response Partial Credit Grading Gene, I have constructed a problem similar to yours, but I don't have time to respond immediately. I will follow with some suggestions probably tomorrow. My problems have constructed multiple parts. We used an image on the background, and I am told by the students developing the problem that the background image did not 'stick' with Chrome, but was OK with firefox and IE. We adjusted the geogebra axes to match the figure axes, and everything scaled fine on our tests. I need to take a look, but I should be able to help with some aspects of the multiple parts, etc. We are having students place line segments one point at a time, so we are evaluating points rather than vectors. Because we do one point at a time, we show the correct answer after they have expended their trials on the first point of each segment, and then they can try to place the second point. Then if that is still wrong, we show them the entire segment and then the move to the next segment. My resource is not published yet, but I may be able to polish it in the next couple days. I will share the source code. My recommendation is to consider multiple part problems as opposed to having them try to do a bunch of steps all at once. That way the partial credit concept still applies, but generally the scores are pretty high anyway. I consider loncapa a tool to help coach the students, not to examine them. We also had to do a lot of learning to use geogebra. We had to play a lot to learn how to properly use the javascript to pass answers from geogebra to loncapa, and how to use sig digits also. You should not need to do a lot of post processing. From: lon-capa-users-boun...@mail.lon-capa.org<mailto:lon-capa-users-boun...@mail.lon-capa.org> [mailto:lon-capa-users-boun...@mail.lon-capa.org] On Behalf Of Harding, Gene L Sent: Wednesday, January 25, 2017 9:56 AM To: 'lon-capa-users@mail.lon-capa.org' <lon-capa-users@mail.lon-capa.org<mailto:lon-capa-users@mail.lon-capa.org>> Subject: [LON-CAPA-users] Function Plot Response Partial Credit Grading Hi, Sorry for another post, but the problems I have been constructing in recent weeks use areas that are new to me, such as gnuplot and Geogebra. I keep getting close, but not quite finishing some of the new problems. Right now I am building a quiz question that requires students to place six vectors on a single set of axes. I have figured out how to place the initial vectors for them to move into place, then separately evaluate the correctness of each vector. Is there a way to assign 1/6 of the grade for each vector, so if a student places some of them correctly but some incorrectly, they get partial credit on the problem instead of all/none? I thought I might be able to do this with some pre- or post-processing of the answer(s), but the standard LON-CAPA examples I have found have no comments in the code, and I have not been able to figure them out (if that is even the right approach...). Best regards, Gene L. Harding, PE Associate Professor of ECET 574-520-4190 Purdue University-South Bend
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