Question 1

What are the Training Grounds?

Accepted Answer

The Training Grounds is a place to review and practice what you've learned in the courses. It's an "infinite" series of dynamically generated challenges personalized to you.

Question 2

How are the challenges generated?

Accepted Answer

Using AI! That said, we've hand-written thousands of challenges, and used those to seed these newly generated ones - it's not just one-shot slop. The generation loop is an agentic system that takes the following into account: Spaced repetition (we use a time-variable algorithm to surface topics you may need a refresher on), Personalization (we try to only give you challenges that require knowledge you've already learned), Mastery (we weight toward topics that you struggled with in the past), Correctness (our system runs the challenges to ensure generated solutions work before you start), and Variety (there are 3 types of challenges: write the code, fix the bug, and interview chat).

Question 3

How do custom instructions work?

Accepted Answer

If you don't enter a custom prompt, you'll get a challenge based solely on your learning history. If you do enter a custom prompt, we'll still use your history, but the system will override any of its choices with your instructions if they contradict.

Question 4

How do the game-mechanics work?

Accepted Answer

Game mechanics like streaks, quests, sharpshooter etc. all work the same way in the Training Grounds as they do in the courses, but the base XP gain of challenges is lower than in regular courses.

Question 5

Why does it take so long to generate a challenge?

Accepted Answer

For now, we're solely focused on generating high-quality challenges, which means we're not spending much time trying to optimize for speed. Speed improvements are coming in the future! The reason it takes so long at the moment is that we're pulling a bunch of stuff about your history into context so we can generate a highly relevant challenge, and once generated, we run the challenge on our backend, then allow the AI to fix any issues before serving it to you.

Question 6

What if the challenges are bad?

Accepted Answer

Challenges are AI generated, so occasionally you'll get some weird stuff, even with all the safeguards, prompts, tests, and hand-crafted examples we've put in place. Be sure to use the star ratings and skip button to give us feedback so that we can keep improving the system.

Training Grounds

Infinite coding challenges personalized to your programming journey

The Perfect Course Supplement

Use learning science to get exactly the programming practice you're looking for

3 ways to grind

Choose how you want to access the challenges

Generate from a custom prompt

Browse student-rated challenges

Let us pick for you

Three types of challenges

Variety keeps practice engaging and tests different skills

Write Code

Fix the Bug

Interview Chat

Frequently Asked Questions

Everything you need to know about the Training Grounds

What are the Training Grounds?

How are the challenges generated?

How do custom instructions work?

How do the game-mechanics work?

Why does it take so long to generate a challenge?

What if the challenges are bad?

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