Class Participation with U of T Web Survey (uoft.ws)

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1 Class Participation with U of T Web Survey (uoft.ws) Brian Sutherland Asst. Professor, Biomedical Communications University of Toronto May 9, 2016

2 Active Learning for Pedagogy Active learning is shown to positively influence student outcomes by increasing student engagement Active teaching and learning strategies can be effectively facilitated by technology

3 Active Learning Strategies Think, Pair, Share Muddiest Point (one minute essay) Compare Notes Jigsaw Content Quiz (Quizzical) 3 Learned, 2 Clarifications, 1 Question (321) Ticket Out the Door Snowball (Read an anonymous comment) Brainstorming

4 Low Tech Active Learning Coloured index cards, hold up the card Raise hand Say aye Stand up/sit down Stamp feet

5 High-Tech Active Learning Mentimeter Top Hat Poll Everywhere (Ken Steele, Andrew McAllister demo d) SmashFact Polls by Blackboard Twitter

6 iclicker Official UofT

7 Desiderata: BYOD UofT Active Learning Solution Same or more features than iclicker 6 Synchronous ctrl of voting, results, and plotting Universal access (HTML5) Old devices work (ipod 3rd Gen Touch 2009) Works in instr. spaces with poor (no) wireless Proximity, UTOR auth? (ibeacon or WiFi range) public, group, or course-section filters

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10 Node.js vs Apache (same hardware) sudo apt-get install apache2-utils siege -c1000 -t30s / ** SIEGE ** Preparing 1000 concurrent users for battle. The server is now under siege... Lifting the server siege... done. Transactions: Availability: Elapsed time: Data transferred: Response time: Transaction rate: Throughput: Concurrency: Successful transactions: Failed transactions: Longest transaction: Shortest transaction: hits % secs 4.08 MB 0.02 secs trans/sec 0.14 MB/sec Transactions: Availability: Elapsed time: Data transferred: Response time: Transaction rate: Throughput: Concurrency: Successful transactions: Failed transactions: Longest transaction: Shortest transaction: hits % secs 3.98 MB 0.02 secs trans/sec 0.14 MB/sec bsutherland@localhost:~$ siege -c1000 -t30s Apache 2.22 ** SIEGE ** Preparing 1000 concurrent users for battle. The server is now under siege... Lifting the server siege... done. Transactions: Availability: Elapsed time: Data transferred: Response time: Transaction rate: Throughput: Concurrency: Successful transactions: Failed transactions: Longest transaction: Shortest transaction: 9607 hits % secs 0.89 MB 0.27 secs trans/sec 0.03 MB/sec Transactions: Availability: Elapsed time: Data transferred: Response time: Transaction rate: Throughput: Concurrency: Successful transactions: Failed transactions: Longest transaction: Shortest transaction: 9962 hits % secs 0.92 MB 0.37 secs trans/sec 0.03 MB/sec

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14 Question Types MC (any number) Short Answer True/False Prototyped Image heat map, e.g. Which is telophase?

15 Student Application

16 Instructor Application

17 Scaling to classes of 2000 students Node.js vs Apache Performance tune MySQL database for rapid events (maybe switch to Redis) Upscale central server Upscale by distributing the load to individual devices

18 Upscale centrally - $2K Server Rebuild; - 12 core i7 5820K - 15MB cache - 32MB DDR4 RAM - M.2 hard drives (6x SATA 3 SSD) 60,000 votes in 30 seconds, no votes dropped 2,000 votes per second (w/ minimal overheating)

19 Making it Portable Raspberry Pi 2 ($42)

20 Upscale with many, cheap device-copies Node.js Raspi 2 A7 Quad ($40, 5W) bsutherland@localhost:~$ siege -c1000 -t30s ** SIEGE hits Availability: % Elapsed time: secs Data transferred: 0.62 MB Response time: 2.77 secs Transaction rate: trans/sec Throughput: 0.02 MB/sec Concurrency: Successful transactions: 8425 Failed transactions: 0 Longest transaction: 4.88 Shortest transaction: 0.12 Transactions: Availability: Elapsed time: Data transferred: Response time: Transaction rate: Throughput: Concurrency: 7752 hits % secs 0.57 MB 3.07 secs trans/sec 0.02 MB/sec Successful transactions: Failed transactions: Longest transaction: Shortest transaction: Intel Q Core 2 Quad ($1000, 95W) bsutherland@localhost:~$ siege -c1000 -t30s ** Preparing 1000 concurrent users for battle. The server is now under siege... Lifting the server siege... done. Transactions: Apache 2.22 ** SIEGE ** Preparing 1000 concurrent users for battle. The server is now under siege... Lifting the server siege... done. Transactions: 9607 hits Availability: % Elapsed time: secs Data transferred: 0.89 MB Response time: 0.27 secs Transaction rate: trans/sec Throughput: 0.03 MB/sec Concurrency: Successful transactions: 9607 Failed transactions: 4 Longest transaction: Shortest transaction: 0.00 Transactions: Availability: Elapsed time: Data transferred: 9962 hits % secs 0.92 MB Response time: 0.37 secs Transaction rate: trans/sec Throughput: 0.03 MB/sec Concurrency: Successful transactions: 9962 Failed transactions: 4 Longest transaction: Shortest transaction: 0.00

21 Demos Server Hotspot UofTWebsurvey WiFi hotspot Pick a username Password <omitted> Password OUCC2016

22 To Do Test w accessibility (voice cues) Better instructor authoring UI, utils More question types Advanced data visualization w d3.js Hotspot http traffic capture wifi to ws Licensing software libraries/open source? Collaborators?