Uploaded December 2024 | Updated September 2026, 2 hours ago
A big impediment to effective learning happens when we misunderstand the nature of what we're trying to learn. Here is an example of (amateur) mathematical thinking in action and some observations about what we're really doing when we're thinking mathematically.
00:00 Intro
00:22 The square-jumping story begins
2:40 A side-note about parity
3:40 A different way of thinking about the same thing
5:04 Another extension
6:24 What did we learn?
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Join my online learning community, here: benjaminkeep.com/community
Edited by Presage: https://www.presage.media/
Big shout-out to Presage Media on this one. This was an animation-heavy video and I love what they did.
References:
I don't have any direct citations, but here are two interesting pieces about mathematical thinking that I have read in the past year.
Stylianou, D. A., & Silver, E. A. (2004). The role of visual representations in advanced mathematical problem solving: An examination of expert-novice similarities and differences. Mathematical thinking and learning, 6(4), 353-387.
Arcavi, A. (2003). The role of visual representations in the learning of mathematics. Educational studies in mathematics, 52(3), 215-241.
A big impediment to effective learning happens when we misunderstand the nature of what we're trying to learn. Here is an example of (amateur) mathematical thinking in action and some observations about what we're really doing when we're thinking mathematically.
00:00 Intro
00:22 The square-jumping story begins
2:40 A side-note about parity
3:40 A different way of thinking about the same thing
5:04 Another extension
6:24 What did we learn?
GiveInternet donation link: giveinternet.org/BenjaminKeep
Join my online learning community, here: benjaminkeep.com/community
Edited by Presage: https://www.presage.media/
Big shout-out to Presage Media on this one. This was an animation-heavy video and I love what they did.
References:
I don't have any direct citations, but here are two interesting pieces about mathematical thinking that I have read in the past year.
Stylianou, D. A., & Silver, E. A. (2004). The role of visual representations in advanced mathematical problem solving: An examination of expert-novice similarities and differences. Mathematical thinking and learning, 6(4), 353-387.
Arcavi, A. (2003). The role of visual representations in the learning of mathematics. Educational studies in mathematics, 52(3), 215-241.










![The best brain training app is NOT the one youre thinking of.
Brains. It would be great if we could train them, huh? But what if the best brain training app turns out to be a commercial video game? Some researchers put the brain training question to the test, comparing the benefits of the brain-training app Lumosity to the benefits of playing a regular, old game—Portal 2. The results, as they say on the internet, may surprise you.
Join my online learning community: https://www.benjaminkeep.com/community
00:00 Introduction
00:28 The Research Design
01:47 The Results
02:46 The Brain Training Game Game
04:01 Irony Time!
05:06 What About Portal?
For more about how our brains use imagination to solve problems, check out: https://youtu.be/-lzzI4jRY7E
Maybe grad school is the best brain training game? Check out: https://youtu.be/elamGFfeDGg
Link to the FTC settlement notice: https://www.ftc.gov/news-events/press-releases/2016/01/lumosity-pay-2-million-settle-ftc-deceptive-advertising-charges
Link to the Lumosity research article page: https://www.lumosity.com/hcp/research/completed
References:
The main study this video was based on:
Shute, V. J., Ventura, M., & Ke, F. (2015). The power of play: The effects of Portal 2 and Lumosity on cognitive and noncognitive skills. Computers & education, 80, 58-67.
(available at https://myweb.fsu.edu/vshute/pdf/portal1.pdf)
For a ridiculously comprehensive take on brain training apps, circa 2016, see:
Simons, D. J., Boot, W. R., Charness, N., Gathercole, S. E., Chabris, C. F., Hambrick, D. Z., & Stine-Morrow, E. A. (2016). Do “brain-training” programs work?. Psychological Science in the Public Interest, 17(3), 103-186.
(available at https://www.ontwerpenvoordementie.nl/assets/simonsetal_2016-braintraining.pdf)
An interesting test of brain training games to completely non-active controls.
Bainbridge, K., & Mayer, R. E. (2018). Shining the light of research on Lumosity. Journal of Cognitive Enhancement, 2(1), 43-62. (currently at https://link.springer.com/article/10.1007/s41465-017-0040-5)
This is more of a correlational study, but finds no association between long-time brain trainers and cognitive function:
Stojanoski, B., Wild, C. J., Battista, M. E., Nichols, E. S., & Owen, A. M. (2020). Brain training habits are not associated with generalized benefits to cognition: An online study of over 1000 “brain trainers”. Journal of Experimental Psychology: General.
(available at https://www.owenlab.uwo.ca/pdf/2020%20-%20Stojanoski%20-%20Journal%20of%20Experimental%20Psychology.pdf)
Studies that win the irony award for being cited on the Lumosity website, but demonstrating that Lumosity doesn’t really improve things.
Withiel, T. D., Wong, D., Ponsford, J. L., Cadilhac, D. A., & Stolwyk, R. J. (2020). Feasibility and effectiveness of computerised cognitive training for memory dysfunction following stroke: A series of single case studies. Neuropsychological rehabilitation, 30(5), 829-852.
(currently at https://www.tandfonline.com/doi/abs/10.1080/09602011.2018.1503083) [No clear benefit of Lumosity in several case studies; high variability.]
Ruiz-Marquez, E., Prieto, A., Mayas, J., Toril, P., Reales, J. M., & Ballesteros, S. (2019). Effects of nonaction videogames on attention and memory in young adults. Games for health journal, 8(6), 414-422.
(currently at https://www.researchgate.net/profile/Soledad-Ballesteros/publication/334717472_Effects_of_Nonaction_Videogames_on_Attention_and_Memory_in_Young_Adults/links/5ddd61a5299bf10bc3294eb6/Effects-of-Nonaction-Videogames-on-Attention-and-Memory-in-Young-Adults.pdf) [Finding no difference between Lumosity and a normal video game in improved memory and attention - actually didn’t have a real control, so who knows what led to the improvement]
Lassonde, K. A., & Osborn, R. M. (2019). Lumosity does not best classroom memory improvement strategies. Scholarship of Teaching and Learning in Psychology, 5(1), 1. (paywall at https://psycnet.apa.org/record/2018-62909-001) [Finding no additional improvement from using Lumosity, at least as far as I can tell from the abstract; it’s behind a paywall.] The best brain training app is NOT the one youre thinking of.](https://i.ytimg.com/vi/WYl-nZyoEXs/mqdefault.jpg)