Active Calculus Preview Activities in Desmos

My GVSU colleagues Marcia Frobish and Taylor Short have created Desmos versions of nearly all of the preview activities in Active Calculus (single variable).  You can see the full collection here, and each link offers an option to preview what students would see if you assigned the particular preview activity to them.  Several even provide students the opportunity to sketch graphs electronically.

By creating an instructor account in Desmos, anyone can use these versions of the previews and assign them in this format to their students and use the wonderful features of Desmos to have students explore and respond while also being able to track students’ progress electronically.

Taylor and Marcia:  thank you for providing this great resource for others to use as a complement to Active Calculus.

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Active Calculus 2018 Workbooks – now available in print

New for 2018, we’ve created bound, print versions of the activities workbooks for Active Calculus.  There’s one for chapters 1-4 (the typical first semester differential calculus material), and another for chapters 5-8 (the typical second semester integral calculus).

Each workbook is 8.5×11″ in size with a soft-bound cover.  The activities are printed on the faces of the odd pages with the even pages left blank for additional room to work.  The pages are not perforated nor three-hole punched, so they are not designed to be removed to hand in.  But I think the format is a really nice one for student to take notes in:  all the activity statements are provided, graphs are large and easy to mark up (including blank axes where appropriate), and all of the activities are in a single location for students.

The workbooks share the same table of contents and a single page-numbering scheme, but are separated into two books so that they are lighter and each appropriate to a single course.  They each sell for $7.95.

University bookstores are still welcome to print the PDFs as coursepacks and sell them to students if that route is preferred.  The PDF versions of the workbook are available upon request at boelkinm at gvsu dot edu.

Special thanks to production editor Mitch Keller of Morningside College for his efforts that have made these activity workbooks possible.

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Active Calculus 2018: PDF and print versions now available

In addition to the aforementioned HTML, the 2018 PDF and print versions of both Active Calculus – Single Variable and Active Calculus – Multivariable are now available.  Here are the various links:

Please take care in directing students to the 2018 or 2017 editions as needed.  All should be clearly marked, regardless of HTML, PDF, or print.

More info at https://activecalculus.org.

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Active Calculus 2018 – new edition

I’m excited to share several updates to Active Calculus:

1. New 2018 edition of Active Calculus – single variable

The 2018 HTML version is now live at https://activecalculus.org/single/.  The PDF will be posted in the near future on a new page at GVSU’s ScholarWorks site.  And the 2018 edition will be available for purchase on Amazon soon as well.  I will post here on the blog when each of these versions in other media are publicly available.

The major differences in the 2018 edition are:

+ improved, more concise prose.  Kathy Yoshiwara of the AIM Editorial Board read and marked up the entire book.  Her changes have made the text less verbose, more consistent, and easier to read.  I’m deeply grateful for her work.

+ appendices with answers to all activities and non-WeBWorK exercises.  See, for instance, https://activecalculus.org/single/solutions-1.html.  These appendices are in the HTML edition and will appear in the electronic PDF, but will not be included in the print edition in order to keep the cost of bound copies as low as possible.  Huge thanks to Rob Beezer (University of Puget Sound) for the added features in PreTeXt and production editor Mitch Keller (Morningside College) for helping make these features a reality.

+ minor errors reconciled.  Thanks to everyone who has sent me an email or filled out the online feedback form to provide corrections and suggestions.  Feedback on errors or ambiguities is always welcome.

+ updated Creative Commons license:  CC-BY-SA.  The prior license had “NC” included.  If you are interested in the differences, see https://creativecommons.org/licenses/by-sa/4.0/ for details.

2.  New 2018 edition of Active Calculus – multivariable — now in HTML

My colleague Steve Schlicker has been hard at work converting the multivariable text to PreTeXt so that it could be published in HTML.  He has concluded that project and you can see the result at https://activecalculus.org/multi/.  Like the single variable text, the PDF and print versions are expected to be public within the next couple of weeks.  I will post announcements here when they are available.

3.  Updated landing page for activecalculus.org, with archive of past editions

At https://activecalculus.org/, you will find links to both the 2018 single and multivariable texts in HTML.  When we have the PDF and print versions available, those respective links will appear there as well.

In addition, at the bottom of https://activecalculus.org/ you’ll find an archive of past editions (currently just the 2017 editions).  Note particularly that the 2017 single variable text in HTML is available at https://activecalculus.org/single/2017/.

We will keep the earlier editions accessible for a minimum of several years.  Faculty, be careful to direct your students to the version you’re using:  if you used the single variable 2017 text for calculus 1 in the winter/spring semester of 2018, you may wish to continue using that for calculus 2 in the fall semester of 2018.  Other than modest updates to the prose (which change pagination in the PDF & print versions) and the presence of the appendices of answers, there are no significant changes.  If you are starting calculus 1 this fall, I recommend using the 2018 edition.

In the near future, I’ll post additional updates at this site regarding the PDF and print versions as they become public.  I also have some new ancillary materials to share.

Please check out https://activecalculus.org/ and don’t hesitate to contact me at boelkinm at gvsu dot edu if you have questions.
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Prelude to Active Calculus – feedback sought

I’ve been awarded a sabbatical for the fall semester of 2018 to write a new free, open-source textbook for GVSU’s new MTH 124: Functions and Models.  The purpose of this course is to prepare students not-yet-ready for calculus for a first semester course in calculus.

MTH 124 has run for three semesters at Grand Valley, and I taught sections of it in both fall 2017 and winter 2018.  The audience is students who have passed or placed out of Intermediate Algebra, but who otherwise would take 3-credit courses in both college algebra and trigonometry.  Because college algebra (MTH 122 at GVSU) and trigonometry (MTH 123 at GVSU) are stand-alone courses that serve large numbers of students as terminal courses, and we found that many aspiring math, statistics, computer science, engineering, and physics majors — whose ultimate goal was to complete part or all of our calculus sequence — were taking MTH 122 and 123, we decided to create MTH 124 to focus on ideas that are most important for calculus to strive to prepare them as much as possible.

This aspiration begs an important question:  what prerequisite ideas are most important for calculus?  In the 2015-16 academic year, a group of us at GVSU thought about this carefully, and developed a syllabus of record for the course.  As colleagues and I have taught the course, we’ve gotten a better sense of what should be included.  Indeed, as I’ve worked with my students, I’ve written a fairly extensive set of activities; if you read the table of contents, you’ll get a good idea of how the course is organized.

So, my ultimate question is to potential users out there, before I start writing in earnest:  what topics and ideas would you most like to see?  From my existing table of contents and activities, what is missing?  Are there things you see in the existing materials that don’t belong?

Another question I have is:   what would you like to see process-wise?  I expect to write in a style very similar to Active Calculus, with a preview activity followed by 3-4 activities per section, along with a handful of challenging writing exercises.  I also plan to include WeBWorK exercises in each section.  There are emerging possibilities with interactive graphics and more, so if you have thoughts, please share them.  The goal will be a very student-driven, active-learning text.

Finally, a relatively minor question – but still one that is important to me – is: what should the title of the book be?  The working title is “Active Precalculus”, as the text will very much be written in the style of Active Calculus.  But the word “precalculus” is often misused in our community, so I’m inclined to try not to use it.  I’ve thought of “Prelude to Active Calculus” or “Getting Ready for Active Calculus” … neither seems quite right.  If you have a good idea, I’d love to hear it.

I would welcome hearing from you in the comments, on Twitter, or directly via email at boelkinm at gvsu dot edu.  Your feedback will be most helpful if I receive it by June 15.

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Edfinity: a textbook-agnostic, NSF-funded nearly free online homework system

I’ve corresponded over the past couple of years with an education entrepreneur named Shivram about his company Edfinity.  They have an interesting project where they are working on an easy-to-use interface for online homework that allows instructors to access open problems and assign them to students for grades.  They have a sane and rational pricing model that they expect to have come in somewhere around $1 or $2 per student per month.  Below you’ll find an invitation to participate in a pilot approach for no cost through the rest of 2018.

At least one faculty member is already using Edfinity’s product with Active Calculus.  In the months ahead, I will be learning more about these opportunities, and I wanted to share this news with others as I think this approach has the potential to provide a strong supporting resource to free and open-source textbooks.  Here’s a blurb from Shivram at Edfinity if you are interested in piloting in their NSF-funded project:

Subject: New NSF-funded Homework System | Invitation to Pilot
++++++++++++++++

EDFINITY (NSF-funded and NSF Small Business Innovation Research award winner) is a hosted, modern and “textbook agnostic”  homework system.

HIGHLIGHTS:  Hosted. Mix and match with OER. Seamless use of WeBWorK problems without the hassle of installation. Leverage over 250 mature courses readily available. Import your own. Create new courses from over 50,000 problems. Share and collaborate. Device friendly.

INVITATION: Edfinity is inviting educators to pilot EDFINITY at no cost during spring/summer/fall 2018.  Our eventual price point is estimated to be $1-$2 per student/month

Please visit edfinity.com/webwork and/or feel free to contact shivram@edfinity.com | 650-380-3627
++++++++++++

If you are using this, I would love to hear from you to know more about your experience.
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A few updates to the HTML version of Active Calculus

I’ve made the following corrections to fix some typos and other errors:

  • The statement of the quotient rule in Section 2.5 mistakenly stipulated that the derivative of the denominator be nonzero, when of course it’s the denominator function itself must be nonzero.
  • In Exercise #6 in Section 3.4, the cost of the top was accidentally omitted from the problem statement; it should be the same as the cost of the bottom of the box.
  • In Activity 4.4.4, the accompanying graph in Figure 4.4.8 was from a previous version of the text/activity and thus the graph didn’t match the problem statement.  The graph has now been updated.
  • In the WeBWorK exercises for Section 4.4, I realized that the exercises there were identical to those in Section 4.3, so those exercises in 4.4 have been updated.

These errors will persist in the print and PDF versions until I release the 2018 version this summer, but the issues have now been fixed in the HTML posted at https://activecalculus.org/single/.  If you have visited the affected sections in the past, you will likely need to refresh your browser and/or clear your cache in order to get the corrections to show.

I’ve also added short titles to each of the WeBWorK exercises; this gives the reader a bit of a clue to the nature of the exercise without having to click on the link to expand the knowl.

At the bottom of the contents that appear in the lefthand panel, there’s a “feedback” link that connects to a Google form.  Thank you to each of the people who have used this to alert me to errors or recommended changes.  You can use that link or send me email directly at boelkinm at gvsu dot edu.

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Check out sustainabilitymath.org

My friend and graduate school colleague Tom Pfaff of Ithaca College has done a lot of great work on issues related to sustainability.  He has a wonderful collection of free resources for instructors at his blog, http://sustainabilitymath.org/.

In particular, you can find sources of real world data for your classes – especially stats, calc, or any QL course.  You can also find updates on sustainability issues such as climate change, inequality, the environment, social justice, and more that you can use both to be a more informed citizen yourself and to potentially share with your students.

You can follow Sustainability Math at
http://sustainabilitymath.org
https://twitter.com/SustMath
https://www.facebook.com/SustainabilityMath

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A new home for Active Calculus: https://activecalculus.org

I’m pleased to announce that the HTML version of Active Calculus will now be found at https://activecalculus.org/single/. At https://activecalculus.org/ you’ll find a landing page that includes an overview of features of the text, links to the various versions of the text, and notes about some ancillaries that are available upon request.  The PDF version remains at https://scholarworks.gvsu.edu/books/15, and the print version is still available on Amazon for less than $20.

In the short term, I will keep the HTML version also at its original home on my faculty web page until people are aware of the new URL.  Please point your students and any bookmarks to https://activecalculus.org/single/, as that will be the main site going forward.

At the Joint Meetings in San Diego, the American Institute of Mathematics will be hosting a launch party at 1 pm on Thursday, January 11, to celebrate the release of the new site.  If you are going to be present at JMM, I’d enjoy meeting you at that time at the AIM booth (booth 215) in the exhibit area; I expect to be present from about 12:45 to 1:45.

I’m deeply grateful to the American Institute of Mathematics (AIM) for their support of this project in many different ways, and for their support of open textbooks generally.  David Farmer of AIM has been instrumental in helping me convert the original text from LaTeX to PreTeXt so that the HTML version was possible; I’m grateful for both his technical support and his strong advocacy for the project.  As always, thanks also to Rob Beezer for creating and maintaining PreTeXT and for the opportunities this language provides to authors, as well as to Alex Jordan for his substantial assistance with graphics in the HTML and PDF versions of AC and for his work in making live WeBWorK exercises possible in HTML.

If you have questions about any aspect of the book, I welcome hearing from you at boelkinm at gvsu dot edu.

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More Linear Algebra

Many years ago, Gil Strang wrote a wonderful short essay titled “Too Much Calculus.”  His thesis:  calculus and linear algebra are imbalanced in the curriculum.  Even as the author of a calculus text, I totally agree.  Our students need more linear algebra, more in terms of time, exposure, and understanding.

My phenomenally talented friend and GVSU colleague David Austin is working to address this situation by making linear algebra more accessible to students.  He has just released the first public draft of his new free, open-source textbook, Understanding Linear Algebra, which is available in HTML format thanks to PreTeXt.  The HTML version of the text has interactive Sage cells and stunning interactive graphics (scroll down, for instance, to the moveable figure in Activity 2.6.2).

I urge you to not only check out the text, but also David’s new blog, More Linear Algebra.  He has a high quality product, keen insights, and more on the way.

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