Justin Skycak ✓
@justinskycak · carrying the floats & logs · joined 30 Dec 2016
Chief Quant @_MathAcademy_ Built the engine behind the most efficient math learning system Created Fractional Implicit Repetition Author of The Math Academy Way
49 966Followers
207Following
10 762Posts total
3.5MViews on collected posts
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Most people study to reduce anxiety, not to increase ability.
Highlighting, transcribing, re-reading… these techniques make you feel like you're preparing yourself.
But they don't really move the needle on actual performance because they don't force you to retrieve information
2.3K views · 61 likes
· 4 reposts · 1 replies
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The retention gain from transcribing or re-reading information pales in comparison to the retention gain from retrieval practice.
The best way to retain material is to test yourself on it.
Only peek back at the reference if you are totally stuck and cannot remember how to
3.8K views · 93 likes
· 3 reposts · 3 replies
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The anti-memorization movement produces grown-ass adults who can't evaluate 5-3x6 without a calculator because they
-- can't do mental arithmetic,
-- never learned their multiplication tables,
-- forgot the order of operations,
-- and forgot how negative numbers work.
4.7K views · 125 likes
· 4 reposts · 0 replies
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Lots of students study way more than necessary while simultaneously learning way less than necessary.
They use low-effort, inefficient study techniques like re-reading and highlighting instead of just sucking it up and engaging in efficient retrieval practice and
15K views · 394 likes
· 21 reposts · 5 replies
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Transcribing, re-reading, highlighting, etc., are all bullshit study techniques.
Seriously, if you want to bullshit someone into thinking that you are studying, without actually retaining much information, then those are the techniques to use.
But if you’re interested in
60.2K views · 1K likes
· 94 reposts · 16 replies
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@justinskycak "You cannot think with knowledge you do not have"
given what I see on here, people sure do try 😅
1.1K views · 36 likes
· 3 reposts · 1 replies
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@justinskycak Evident in sports and music. Can’t invent new crossover unless you have elite handles already in the system. https://t.co/WnvSPmtRf8
1.2K views · 39 likes
· 4 reposts · 1 replies
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@justinskycak Picasso is a perfect example. Strict/rigorous classical training from his professor father, Barcelona Academy, and the Royal Academy before breaking the mold with cubism, assemblage, blue period, etc.
669 views · 23 likes
· 0 reposts · 1 replies
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You cannot be creative at a high level unless you are robotic at a low level. https://t.co/3EisKkC2sM
330.5K views · 10.4K likes
· 1.6K reposts · 70 replies
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@justinskycak I think this applies beyond math to languages and just logic in general.
Maybe we need to start having mental gyms just like we have physical gyms, now that memorization and thinking are becoming more and more optional.
12.8K views · 212 likes
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@justinskycak Im a professional memory scientist and professor and i approve this message
4.1K views · 78 likes
· 0 reposts · 1 replies
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@justinskycak Shouldn't memorization just be a result of repetition in actual use? I'm only anti-memorization it precedes real problem-solving.
6.4K views · 54 likes
· 0 reposts · 8 replies
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The anti-memorization movement has left millions of students unable to think because every elementary operation consumes working memory.
For instance, solving equations feels smooth when basic arithmetic is automatic. It's like moving puzzle pieces around, and you just need to
1.1M views · 5K likes
· 934 reposts · 59 replies
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It's shocking how predictive working memory capacity (WMC) is. It's even a better predictor than IQ when predicting a young student's future academic success. https://t.co/4YjF87YfuL
356.1K views · 1.9K likes
· 138 reposts · 35 replies
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This is the textbook I wrote to support the most advanced high school math/CS sequence in the USA.
It's freely available. Link in first reply.
In Math Academy's (former) Eurisko program, which ran from 2020-23, we scaffolded high school students up to doing masters/PhD-level ht
683.2K views · 5.8K likes
· 712 reposts · 65 replies
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@justinskycak thanks Justin! MA and Eurisko were amazing opportunities.
5.6K views · 132 likes
· 0 reposts · 4 replies
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I'm so proud of Matteo for the many years of hard work he put in leading up to this point, and I'm so happy he's getting to see it seriously pay off so early in life.
Matteo and other @_MathAcademy_ students took their mathematical talent development seriously and learned
-- ht
10K views · 240 likes
· 18 reposts · 3 replies
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Can't think of a better way to close out 2025 than seeing the head of NASA ask my former student @matteopaz06 to apply, with a fighter jet ride as a signing bonus.
Matteo was one of my students in the Eurisko program, which, during its operation from 2020-23, was the most
772.3K views · 4.4K likes
· 328 reposts · 82 replies
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@MAstronomers @justinskycak update: @_MathAcademy gets you a tweet from the head of NASA and a ride in a fighter jet https://t.co/dbEzIVcsZR
198.9K views · 123 likes
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Against accounts of the same size
14 posts from the last 90 days, next to the 10K–100K follower range. shown far beyond its own audience, and the audience reacts.
Median views5 569this account1 020median for 10K–100K
Reach, %11.15%this account4.00%median for 10K–100K
Engagement, %2.67%this account1.55%median for 10K–100K
| Metric | This account | Median for 10K–100K | Ratio |
|---|---|---|---|
| Median views per post | 5 569 | 1 020 | 5.46× |
| Reach (views ÷ followers) | 11.15% | 4.00% | 2.79× |
| Engagement rate | 2.67% | 1.55% | 1.72× |
Others in this range → Compare with another account → How these benchmarks are built →
Growth & engagement
How the posts we collected actually performed: views and reaction rate post by post, what the audience did with them, and where the follower count goes.
Views per post
356.1K7 Sep
1.1M8 Sep
6.4K
4.1K
12.8K
330.5K9 Sep
669
1.2K
1.1K
60.2K10 Sep
15K11 Sep
4.7K
3.8K
2.3K12 Sep
Last 14 collected posts, oldest on the left. The scale is logarithmic: one post can outrun the rest a hundred times over.
Engagement rate per post
0.58%7 Sep
0.58%8 Sep
0.97%
1.91%
1.78%
3.68%9 Sep
3.59%
3.53%
3.54%
1.84%10 Sep
2.79%11 Sep
2.73%
2.61%
2.87%12 Sep
Reactions — likes, reposts, replies and quotes — divided by views. Median for 10K–100K accounts is 1.55%.
What the audience does
Likes61.0%30 016 in total
Reposts8.0%3 931 in total
Replies0.7%362 in total
Quotes0.4%206 in total
Bookmarks29.9%14 713 in total
Share of every reaction we collected for this account. Replies mean argument, reposts mean endorsement, bookmarks mean the post was worth keeping.
Followers by day
12 Sep
Daily snapshots since 12 Sep 2026; the dashed line is the starting count.
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