neoCatalyst Labs

Free chemistry simulations are everywhere. A record you can put on a transcript isn't.

31 high school chemistry labs, run in the browser — nothing to buy, store or burn. Your student does the work; the course writes down what they did.

A transcript package showing a course grade of A minus at 91 percent, based on 12 of 31 labs marked, above an hours log listing each lab with its logged time.

The transcript package — a course grade, what it's based on, and the hours logged per lab. Built from one report per lab ↓, generated as your student works.

$25 one-time

Five labs, each with its own dated report, logged hours and the standard it covers.

Or run a full lab free — no account

14-day refund if fewer than 3 labs are completed.

Want all 31 labs? Full course is $149 →

📄 See a lab's reportWhat the transcript is built from → ✓ See how you'd mark itWithout knowing chemistry → ⚗️ See what your student doesA complete lab, start to finish →

Where that comes from

Every lab finishes its own report — dated, with the readings your student took, the calculation they did and the standard it covers. Thirty-one of them roll up into the transcript package above.

A finished lab report showing the student name, date, 41 minutes of lab time, the NGSS standard, the experimental setup, a results summary and the full concentration calculation.

One lab's report. Their name, the date, the minutes logged, and the NGSS standard the lab addresses — with their own numbers in the results.

Hours are logged as they work, not reconstructed at the end of the year.
Every report carries a code anyone can check at neocatalystlabs.com/verify — including a school or an admissions office.
Download it as a PDF, or print the whole package.

How you'd mark it

This is the part most parents are actually worried about. You don't need to remember the chemistry: the guide puts your student's own answer beside what a complete answer contains, in plain English. You tick what's there and it does the arithmetic.

The marking guide: the student's answer beside plain-English criteria with tick boxes, totalling to a mark of 96 percent, with a note that the parent decides the mark.

The marking guide. Criteria in plain English, your ticks, and the total. We don't assess student work or issue grades — the mark is yours to set, and you can override it.

Your student never sees this — it's effectively an answer key.
Every one of the 31 labs has its own guide, written from the questions your student was actually asked.

What your student does

Not a video and not a quiz. They set up the apparatus, take the readings themselves, decide when the reaction is done, then work the answer out from their own numbers and explain it in their own words.

An acid-base titration in the browser: the apparatus with a pink flask, a pH meter reading, and the pH curve building from the student's own measurements.

An acid-base titration, mid-run. The curve builds from the readings they take — so the numbers on their report are theirs.

31 labs across 10 units — atomic structure, bonding, reactions, stoichiometry, gas laws, solutions, thermochemistry, acids and bases, nuclear.
Each opens with its own pre-lab reading, so a topic covered months ago doesn't have to be re-taught before they start.

Run one yourself, free — no account, no card →

Before you decide

Read a complete report, annotated — the whole document with the parts that matter pointed out: where the hours came from, why the standard is already identified, and why you sign it without having written it. Or take the PDF. No email required for either.

One-time payment, 12 months of access. No subscription and no auto-renewal. If fewer than three labs are completed, there's a 14-day refund.

Built by a homeschooling parent who needed the paperwork and couldn't find it. Questions go to support@neocatalystlabs.com and reach a person.