Does Student Crowdsourcing of Practice Questions and Animations Lead to Good Quality Materials? Alex Edgcomb, Joshua Yuen, and Frank Vahid University of.

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Presentation transcript:

Does Student Crowdsourcing of Practice Questions and Animations Lead to Good Quality Materials? Alex Edgcomb, Joshua Yuen, and Frank Vahid University of California, Riverside Dept. of Engineering and Computer Science Also with zybooks.com Copyright © 2015 Alex Edgcomb, UC Riverside. 1 of 13

Crowdsourcing interactive material 2 of 13 Web: Enables - But static + Interactive more powerful Wikipedia.org Copyright © 2015 Alex Edgcomb, UC Riverside.

Memory architecture: Text A disk can store many programs. Memory can store fewer programs than a disk. Cache (located on the processor) can store even fewer. A disk connects to memory, and memory connects to the cache on a processor. For example, if the user runs a program ProgA, then ProgA is copied from the disk to memory, from memory to cache, then ProgA is executed. If the user then runs ProgB, then ProgB is copied from the disk to memory, from memory to cache, then executed. If the user then runs ProgA again, then ProgA is copied from memory to cache, then executed. 3 of 13 Not ideal Copyright © 2015 Alex Edgcomb, UC Riverside.

Memory architecture: Figure (a) (b)(c) (a)User runs ProgA. ProgA is copied from Disk to Memory to Cache, then executed. (b)User runs ProgB. ProgB is copied from Disk to Memory to Cache, then executed. (c)User runs ProgA again. ProgA is copied from Memory to Cache, then executed. 4 of 13 Better, but not ideal Copyright © 2015 Alex Edgcomb, UC Riverside.

Memory architecture: Animation 5 of 13 Copyright © 2015 Alex Edgcomb, UC Riverside.

Crowdsource animations? Can students: – Create? Rate? Study – 587 CS0 students, 3 groups: 1.Creators 2.Raters 3.Raters of top-19 + professional 6 of 13 Copyright © 2015 Alex Edgcomb, UC Riverside.

Some create good animations 7 of 13 Copyright © 2015 Alex Edgcomb, UC Riverside.

Some students can reliably rate animations 8 of 13 r-value = 0.74 p-value = Copyright © 2015 Alex Edgcomb, UC Riverside. Student ratings Professor rating

Learning questions 9 of 13 Copyright © 2015 Alex Edgcomb, UC Riverside.

Crowdsource learning questions? Can students: – Create? Rate? Study – 25 upper-div students in embedded systems course. Each: Created 6 questions Rated 7 professor & 7 student questions 10 of 13 Copyright © 2015 Alex Edgcomb, UC Riverside.

Students did not create good questions Prof-rated 1 out of 5. Conceptually confused Wording not precise Explanation wrong 11 of 13 Prof-rated 1 out of 5 Conceptually confused Usage of “must” leads to wrong meaning Answers not mutually exclusive Copyright © 2015 Alex Edgcomb, UC Riverside.

Some students can reliably rate learning questions r-value = 0.46 p-value = of 13 Copyright © 2015 Alex Edgcomb, UC Riverside. Student ratings Professor rating

Conclusion Web: New publishing – Enables crowdsourcing – Real power – Interactivity Students could – Reliably rate animations / questions – Create good animations – Not create good questions Crowdsourcing interactive content promising – Future: Instructors 13 of 13 Gratefully acknowledge NSF: SBIR / Copyright © 2015 Alex Edgcomb, UC Riverside.