A clean dataset teaches the wrong reflex
If the data is tidy, the technique is the whole task. Real analysis is mostly deciding what the data does not say, and a project that never has a missing value never asks for that.
For people who teach analysts
Every course ends with a dataset and a known answer, so every student finishes with a certificate and no idea whether they are any good. This is fifty minutes in a company that is not clean, where the dashboard is wrong and nobody has done the analysis for them.
No sign-up, and nothing is recorded. It is the same environment your students would sit.
If the data is tidy, the technique is the whole task. Real analysis is mostly deciding what the data does not say, and a project that never has a missing value never asks for that.
A fixed dataset has a fixed answer, and by the second cohort it is in a public repository. Here the company is generated, so there is nothing to look up.
Which is why employers discount them. A student who has never been measured against a real problem walks into their first interview without knowing where they stand.
The same thing a candidate does in a real hiring process, because it is the same product.
Twelve colleagues who each see one part of it and disagree with each other. Six to twelve tables of its own CRM, billing and marketing spend, with tens of thousands of rows.
You choose which, per cohort. It all runs in the browser — nothing for a student to install, and nothing that fails the night before a deadline.
A third of the deals have no source recorded. A date column holds when somebody updated a record, not when anything happened. Take it at face value and you reach a confident wrong answer — which is the lesson.
Nine decisions, each with a confidence and the result behind it. Being confidently wrong costs more than being tentatively wrong, which is a thing worth learning before a job rather than during one.
A small number of courses first, free, while the parts that are specific to teaching get built. Being straight about which is which:
If one of those three is the reason you would say yes, tell me and it goes first. That is what a pilot is for.
Tell me what you teach and how big a cohort is. If it fits, you get it free while it is being built out, and a say in what gets built.