- The Leap
- Pages
- Spreadsheet Systems

Before You Learn Another Tip, Trick or Formula. . .
Learn how to structure your spreadsheets so they don’t fall apart.
If Excel makes you feel intimidated, frustrated, or like your sheets are always one step from falling apart, you’re not alone.
Most people have learned all of the formulas and hacks.
But no formula can save an unstructured, poorly designed spreadsheet.
Over time they become bloated, unusable and you often end up re-building them.
This course teaches you the skill no one talks about:
How to design your spreadsheets like software by understanding data structures and organization. With clean inputs, logic that’s easy to follow, and data structures that will scale and not collapse.
Join The Waitlist
If you’re tired of feeling frustrated and overwhelmed in Excel, and want to build spreadsheets that work like software — join the waitlist below:
Who Will Be My Instructor?
Over my career spanning science, investments and startups, I’ve built hundreds of spreadsheets.
From modeling complex mortgage-backed securities, credentialing trackers, macro economic simulations, financial pro-forma statements, I was what most would call an “Excel Wizard”.
But a few years ago, my entire approach leveled up and it had nothing to do with learning new formulas.
It happened after I started building iPhone apps.
One evening, frustrated while working on a complicated financial model for a Series A startup, I had a realization:
In software, the user interface (UI/UX) is completely separate from the backend data.
In Excel, they exist in the same place, across a bunch of tabs.
That insight changed everything.
I restructured the model from the ground up — and what came out was no longer just a spreadsheet. It was a system that functioned like software: clear inputs, modular logic, and outputs that made sense.
The best validation came later, when a startup CTO interrupted me mid-presentation and said:
“This could be a SaaS product.”
Now, I want to teach you how to think — and build — spreadsheets the same way.

Les Blake - Fractional CFO | Founder | Builder | Investor