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Apropos of nothing, high-quality free math Open Educational Resources (OER) are somehow both well-established and underrated. Don't make your students pay for what they can get for free. Off the top of my head...Permalink On twitter.com
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.@AIMathematics curates a gallery of resources here: pretextbook.org/gallery.html Open submissions of further works are here: pretextbook.org/catalog.htmlPermalink On twitter.com
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These are all written in the open source language PreTeXt, which exports PDF, HTML, and more: pretextbook.org and #PreTeXtGangPermalink On twitter.com
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Long before I knew of that, I was a graduate student whose undergrad Cal students frequently cited Paul's math notes as a simple, direct, and useful guide to calculus. tutorial.math.lamar.edu/Permalink On twitter.com
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For a more puzzly guide to mathematics, the Journal of Inquiry Based Learning has several well-scaffolded notes for guiding students along their mathematical journeys. jiblm.orgPermalink On twitter.com
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I haven't worked with them directly, but @OpenStax is a well-known curator of textbooks in many areas.Permalink On twitter.com
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@OpenStax Likewise @LibreTexts.Permalink On twitter.com
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As for homework, personally I prefer to utilize the LMS that your students likely have to pay for anyway. That's why I created @CheckItProblems to author high quality randomized math problems that hook into that existing workflow.Permalink On twitter.com
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While that project's in its infancy, there's always @WeBWorK2, an MAA supported project that's been around for many many years. You can host a server yourself or pay for something like @EdfinityUS to provide it as a service.Permalink On twitter.com
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@WeBWorK2 @EdfinityUS Anyone that has public support for their work should make it OER. That's why we made the Team Based Inquiry Learning resource library open without any required registration, paywall, etc: sites.google.com/southalabama.edu/tbil/tbil-resource-libraryPermalink On twitter.com
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Bottom line: there's plenty of support for OER out there. I look forward to collaborating with existing organizations further to help eliminate the inequities that block folks from success in mathematics.Permalink On twitter.com
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Please add the obvious omissions to this thread, I'm only one person lolPermalink On twitter.com
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Oh myopenmath.com is another online homework system.Permalink On twitter.com
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For visualizations, CalcPlot3d c3d.libretexts.org works pretty well!Permalink On twitter.com
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I suppose it's worth noting that, depending on your definition, not all of these are OER. I hope to see a future where folks use licenses comparable to MIT or Creative Commons as appropriate.On twitter.com
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For mathematical computing, check out @sagemath — try it online at sagecell.sagemath.org (I send my students to it for all computational needs for my 100/200 courses).Permalink On twitter.com
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Tired of pricey math computation licenses and playing tech support for students? Full turnkey @sagemath environments are available in the cloud at @cocalc_com, and they also offer it as a free local Docker instance.Permalink On twitter.com
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Linearizing everything I can find in this tree... @KahnNahpPahn/1460087776150495233?s=20Permalink On twitter.com
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Oh dang yes, this and anything else @kisonecat touches. @niveknosdunk/1460260816557535237?s=20Permalink On twitter.com
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See above and below this tweet for lots of excellent FOSS suggestions for the classroom. I'd reframe this slightly: textbooks & software are both insufficient. What we need more of are completely packaged courses, from classroom activities to assessments. @virgil_pierce/1460266127326695427?s=20Permalink On twitter.com
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So I finally have the excuse to segue into a plug for sites.google.com/southalabama.edu/tbil/tbil-resource-library which will provide full course packages for Cal 1-2 and LA, with beta resources available now. @siwelwerd @CParrishUSA @JulieEstis @bestlab supported by @NSFPermalink On twitter.com
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@siwelwerd @CParrishUSA @JulieEstis @bestlab @NSF These in turn are built upon several technologies and OER texts already cited above like @MattBoelkins' ActiveCalculus.org, @davidaustinm's LA text, #PreTeXtGang, @CheckItProblems...Permalink On twitter.com
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For students getting into advanced mathematics, mathdb.mathhub.info is a great database of databases of mathematical objects, including oeis.org and topology.pi-base.orgPermalink On twitter.com