Mathchops’s Substack
Mike McGibbonUsing theory, data, and games to learn more about learning.
| Platform |  | Pricing | Only free issues | Publishes | Weekly |
|---|---|---|---|---|---|
| Issues | 109 | Founded | 3 years ago | Last Issue | 10 days ago |
| Active | |||||
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mathchops.substack.comLatest Issues
Enhanced ACT Math Vs Legacy ACT Math
Now that we have more official Enhanced ACTs, I can produce a better version of the chart that compares the current ACT to the old (“Legacy”) ACT:
I made this by tagging every question from every test, then running the tags through python...
Decision Hygiene: My Top Ten List
Test prep isn’t just about learning math, reading, and grammar — it’s about making good decisions, too. We all mistakes under pressure. What are the most common ones, and how can we avoid them?
I’ve listed ten concepts below that have been...
10 Books For Summer Reading
Ask any tutor what skill is the hardest to improve and you’ll get the same answer: pure reading comprehension. Math and grammar skills improve steadily if you work on the right material. You can teach time management, decision hygiene, and...
The Test That Teaches
Unfortunately, all tests are vulnerable to gaming. There’s even a “law” about this, often attributed to Charles Goodhart: When a measure becomes a target, it ceases to be a good measure. Let me give you a quick example. Suppose you wanted t...
SAT vs ACT Math 2026
Here’s an updated version of a graphic I like to use that compares SAT and ACT math content.
I’ll usually pull it up in the first session, when we’re talking about the pros and cons of the two tests. I always feel like I’m talking too muc...
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Mike is the CEO and co-founder of Mathchops. He's been a tutor in the NYC area for 20+ years.
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