VIRTUAL CONFERENCE · 2021. 3. 7. · Today: Edwards-Penney-Calvis DE’s. 32nd International...
Transcript of VIRTUAL CONFERENCE · 2021. 3. 7. · Today: Edwards-Penney-Calvis DE’s. 32nd International...
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32nd International Conference on Technology in Collegiate Mathematics
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VIRTUAL CONFERENCE
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Video Design and Creation Using MyLabMath for a Differential Equations
Course and Text
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C. Henry Edwards, Jr.
Emeritus Professor of MathematicsUniversity of [email protected]
David Calvis
Professor of MathematicsBaldwin Wallace UniversityBerea (Cleveland), [email protected]
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How We Became Video Makers
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Edwards-Penney Differential Equations
• First edition appeared in 1985 (!)
• Original authors from the University of Georgia:o Henry Edwards
o David Penney
• They also published textbooks in Calculus and Linear Algebra.
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Today: Edwards-Penney-Calvis DE’s
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Tech Update
• In 2016 our editor proposed that our flagship text join MyLabMathby receiving a “Tech Update”.
• Etext, online homework, and instructional videos.
• The videos would be developed by the author team (that’s us!)
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On-The-Spot Help
• The videos would provide detailed explanations of sample problems in the text…
• …delivered within MyLabMath at the student’s point of need.
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How Do You Make an Instructional Video?
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What Kind of Videos Should We Make?
• The project called for over 100 videos.
• We had an essentially blank canvas.
• What did we want the user to see?
• What did we want the user to hear?
• What tools would we use?
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Video
• Should we write out mathematics in real time?
o That way you can circle, highlight, etc.
• Or should each slide be static?
• How would we create mathematical notation?
• Would we appear on screen?
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Audio
• How detailed should the explanations be?
o Tradeoff between detail and conciseness
• Would we need to write out a complete script
for each video?
• Did we need an expensive microphone?
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Structure
• How long should these videos be?
• What common “look and feel” did we want to
achieve across all of the videos?
• What were the publisher’s technical
specifications?
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What We Decided to Do
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For the Slides: LaTeX
• We decided to use LaTeX (“Beamer”) to make the slides.o Beautiful mathematical notation
o Precise symbol placement
• However, we needed to choose a visual theme.
• We chose “Metropolis”.
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Structure
• Each video has three sections:o Problem Statement
o Review of Theory
o Solution
• Exampleo Note the Metropolis theme:
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Highlighting Text
• Rather than circling things in real time…
• …we chose to use red highlighting…
• …using a color approved for accessibility.
• An example of text highlighting in successive
bullet points:
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Highlighting Mathematics
• The LaTeX environment proved to be excellent
for highlighting mathematics.
• We made heavy use of drawing boxes around
expressions, often with labelling.
• A sample to illustrate:
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Producing the Videos
• The publisher specified Camtasia.
• This made it easy to do the voiceovers and
export them as .mp4’s.
• We used an inexpensive headset microphone.
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Voiceovers
• For the voiceovers it was important that
everything on the screen be read out loud…
• …making the videos more accessible to visually
impaired students.
• So we read every entry of every matrix!
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Audio Editing
• Camtasia made it easy to edit out bloopers.
• To filter out breathing noises, we used the free
software Audacity.
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Some Results
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Total Video Counts
• Our flagship text Differential Equations:
Computing and Modeling required over 110
videos.
• About 36 additional videos were needed for
Differential Equations & Linear Algebra.
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Duration of Videos
• Varies considerably from one video to the next.
• We erred on the side of completeness, rather
than brevity.
• Longest videos run almost half an hour.
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Pattern of Work
• Typically DC would create the slides and submit to CHE for review.
• Next the voiceovers were added and .mp4’s produced.
• After further review, video was sent to accuracy checker.
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Time Required
• The most time-consuming part was designing
and coding the slides in TeX.
• Altogether, each video took perhaps 3 hours to
create…
• …although some were stubborn!
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Contact Information
David CalvisDepartment of MathematicsBaldwin Wallace University