The story behind Duolingo's 350% growth acceleration, leaderboards, streaks, notifications, and their innovative growth model

Carole spent over 20 years teaching the Stanford GSB course Interpersonal Dynamics, affectionately known as “Touchy Feely.” After leaving Stanford, she founded a nonprofit called Leaders in Tech, which applies the Touchy Feely principles to help Silicon Valley executives build their leadership and interpersonal skills.

Whatever you think of Israel, there's just no future in "global intifada" and "Death to America".

But his plan needs a lot of work.

The late Julian Wasser had unprecedented access to stars at their most unguarded

Prime Video, Par+ and the future of what gets watched (and what NFL has to do with it)

Problems at Roblox (RBLX)

New Activist Reports, Recent Resignations, and Tweets of the Week

A Short History of the World — Danielle DiMartino Booth

It was a bone-chilling day on January 27, 1778. A frigid wind was blowing off the Hudson. The Connecticut militia unit was marching across the river and setting up camp at what we now call West Point, New York. But did you know that it had several nominal iterations before it came to be known as what we call it today? Between 1778 and 1780, Polish engineer Tadeusz Kościuszko designed and oversaw garrison defenses at “Fort Arnold.” And Benedict Arnold’s 1780 betrayal accompanied a name change to “Fort Clinton.” It wasn’t until 1790 that Secretary of the Treasury Alexander Hamilton purchased West Point for $11,085. There, President Thomas Jefferson trained officers for the rapidly expanding U.S. army. Today, we revere the United States Military Academy because it has, “consistently upheld its mission of educating, training, and inspiring cadets to become leaders of character, prepared to serve their country with honor and distinction.”

Antitrust lawyers filed a class action lawsuit against private equity-owned Varsity Brands, the organizing force behind competitive cheerleading.

In an extraordinary week, the government blocked several mergers, banned non-competes, restructured our communications environment, passed a Federal privacy law, and regulated airlines.

Real progress comes from elimination. If you look for it, there is a great contradiction in how most people spend the New Year. They sit down, decide their resolutions, and usually end up “adding” something…but the greatest changes I’ve seen in my most successful clients have come through subtraction.

Set Yourself Up To Focus

Plus the TikTok ad that keeps tricking me, a small (but big) Reels update, and more.

Flynn Slicker gives us a behind-the-scenes look at Letterboxd's social strategy

*New announcement for agribusiness leaders!

Essential news and analysis for agribusiness leaders.

While many advocates have focused on zoning reform, one change could unlock even more new housing: legalizing single-stair multifamily.

Taking an institutional investor approach to personal real estate investment opportunities

Welcome to Level Up: Your source for career growth solutions & community by retired Amazon Vice President, Ethan Evans. A reader asked: "What are the top 3-5 things to do in the first 90 days when onboarding in a new role (2nd level engineering manager) at a new company?"

Member exclusive

Hummingbird Ventures has built an astonishing track record – all while staying out of the limelight. Its secret to success? A meticulous approach to identifying outlier founders.

Why we’re entering into an automation supercycle.

Are you a Non-Obvious Pirate? Or an Obvious Non-Pirate?

Your biggest competition is thinking you have competition.

A tale of two clerkships: it was the best of times, it was the worst of times.

My quick primer on an interesting—and increasingly important—issue in the world of federal courts.

Week in Review: January 15-19

Week in Review: April 22-26

The paper relaunched their nightlife reporting!

+ a Glossier OG joins Substack, our first guest lecture.

Total victory for NAR, and nothing much changes

The prospect of builders opting-out

A plan for Q1 success

And an Opportunity for Ambitious Bums

Brand marketing is back in favor, but it has a new operating system

If you want a transformed fashion industry, distribute its creativity

One of the least appreciated risks in the oil market: The increased substitution among energy sources

Summary Figure (1) above shows Russia’s weekly exports of clean and dirty products. It shows the large decline in recent weeks as the government…

Weź prosty pomysł i potraktuj go poważnie.

You are lucky if anyone cares about your idea.

January's three part series on board meetings for tech startups

Part 4 of 4 in our month long series on Network Effects

When did Silicon Valley Bank insiders begin to realize they were potentially in trouble?

Did an "AI hallucinated" GP temporarily manage OpenAI Startup Fund?

A lesson in the complexities of private equity

Hi Fintech Architects, Welcome back to our podcast series! For those that want to subscribe in your app of choice, you can now find us at Apple, Spotify, or on RSS. In this conversation, we chat with Libor Michalek - President at Affirm. Libor oversees engineering, risk, operations, product and design. He previously served as Affirm's President of Technology and Chief Technology Officer. Prior to joining Affirm, Libor was an Engineering Director at YouTube and Google where he was responsible for Application Infrastructure & Site Reliability Engineering across multiple sites. During this tenure, YouTube tripled in page views, hours of video watched and revenue.

Saturday, December 2, 2023 – Issue 1411

Wednesday, April 24, 2024 – Issue 1452