Discover Calculus
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discovercalculus.com
Discover Calculus
@discovercalculus.com
An open copyright, online textbook for single variable calculus with a discovery-based perspective from @mathprofpeter.bsky.social. We build the big ideas together through guided and interactive activities.

www.discovercalculus.com | (WIP)
I probably *should* leave this until next semester, but I think I'll likely leave this as an end-of-chapter exploration, once we finish going over Taylor series. I'll try to remember to send it to you when it's ready!
November 24, 2025 at 2:21 PM
Anyways, that was my small win for the semester, and I'm glad that this text was helpful to students.

If you want to see what they were up to, they were told to do these two activities:
1. www.discovercalculus.com/web/sec-FTOC...
2. www.discovercalculus.com/web/sec-FTOC...
November 21, 2025 at 11:46 PM
Having these interactive activities has mainly been geared towards what to do in class, but I also hoped that they could be helpful for students who miss class or want to recreate the same kind of environment. It seems like it worked really well in this specific instance!
November 21, 2025 at 11:46 PM
In class when we returned, about a third of the students told me about how they just kept reading and kept doing more of the "in-class" activities. They were excited about finishing the Fundamental Theorem of Calculus and learning what how to compute definite integrals.
November 21, 2025 at 11:46 PM
Students were supposed to do two activities to build the first part of the Fundamental Theorem of Calculus. Then, I figured we'd construct the second part together, and not lose too much time.

Not only did most students actually do it, but many of them worked ahead!
November 21, 2025 at 11:46 PM
Still lots to do compiling everything and updating the website, but we can celebrate for now!
October 31, 2025 at 3:55 PM
September 7, 2025 at 1:23 AM
I think it's missing in a lot of early college courses, too! Students get the feeling (in calculus courses, at least) that math is more about computing things instead of exploring objects and their properties!
July 24, 2025 at 4:12 PM
The third one is! The first two interactive ones are built using Doenet and the last one is just plain tikz.
July 3, 2025 at 11:33 PM
We get to see that continuity sure does help to make the limit of the Riemann sum exists, and so it's an important property in terms of integrability, but not a necessary one!
May 24, 2025 at 12:37 PM
May 23, 2025 at 11:11 PM