virtual conference · 2021. 3. 7. · today: edwards-penney-calvis de’s. 32nd international...

32nd International Conference on Technology in Collegiate Mathematics

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VIRTUAL CONFERENCE

32nd International Conference on Technology in Collegiate MathematicsORLANDO, FL | MARCH 12-14

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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

[email protected]

virtual conference · 2021. 3. 7. · today: edwards-penney-calvis de’s. 32nd international...

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