STEM Journal and Portfolio
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What you will learn
- 1Describe the parts of a dated lab notebook entry: question, sketch, raw data, and reflection
- 2Tell raw data apart from cleaned data and from a written reflection
- 3Explain how to curate a portfolio of artifacts that show your best science work
- 4Explain how a portfolio is evidence of growth across the year
Mini Lesson
A scientist is only as good as their notes. Even a brilliant experiment is wasted if you cannot remember what you did, what you measured, or why it mattered. That is what a STEM journal and portfolio are for. The journal is the daily lab notebook where every test, sketch, and number lives. The portfolio is the curated set of your best work that shows how much you have grown. In this lesson you will learn what belongs in each, how they differ, and why both matter.
What goes in a lab notebook
A lab notebook is a daily log. Real scientists keep one, and so should you. Each entry is dated, written in pen, and never erased — if you make a mistake, you draw a single line through it so the original is still readable. Honesty matters more than neatness.
- Date and entry number at the top of every page.
- A focus question — the one thing you are trying to find out today.
- A labeled sketch of your set-up or specimen, even if it is rough.
- A raw data table with units (cm, s, deg C, g) on every column.
- A reflection: what you noticed, what surprised you, what you would change tomorrow.
Raw data vs cleaned data
Raw data is exactly what you measured — every number, including the weird ones. Cleaned data is raw data after you check for typos, average repeats, and remove obvious mistakes (a thermometer fell out of the cup; that reading does not count). Both belong in your work, but they live in different places. Raw data stays in the journal, untouched, so you can always go back and check. Cleaned data goes into the graph or the report.
What a portfolio is
A portfolio is not the journal. The journal is everything; the portfolio is the best of everything. You curate it — that means you choose. At the end of a unit or year, you pick a small number of artifacts that show what you can do and how you have grown.
- Artifact: one piece of finished work — a photo of your model, a cleaned graph, a written summary, a feedback note from a family member.
- Curate: choose carefully which artifacts go in, and write a short caption for each saying why it matters.
- Evidence of growth: pair an early piece with a later piece on the same skill so a reader can see you improved.
- Reflection page: one short paragraph at the front explaining what the portfolio is meant to show.
You are putting together your science portfolio for the year. You have 30 lab entries. How many should you include, and how should you pick them?
A portfolio is curated. Including everything is just a copy of the journal. Choose a few strong pieces — a labeled diagram, a cleaned data graph, a CER summary, a family feedback note — and write a sentence on each saying why it matters.
Why both matter
- The journal protects you: if a result is challenged, you can prove what you measured and when.
- The portfolio shows you: it is the version a parent, a judge, or a future you will read to see what you can do.
- Together they make your work trustworthy — anyone can follow the trail from raw data to claim.
Warning: never tear out a journal page or rewrite raw data to look nicer. Both destroy the record. Strike-through, then write again.
Words to know
lab notebook
A daily, dated log where every experiment, sketch, and raw measurement is recorded in pen.
entry
One dated page in the lab notebook covering a single day of work.
raw data
The exact numbers and observations you measured, before any cleaning or averaging.
reflection
A short note at the bottom of an entry saying what you noticed and what you would change.
portfolio
A curated collection of your best science work that shows what you can do and how you have grown.
curate
To choose carefully which artifacts go in a portfolio and explain why each one matters.
artifact
One finished piece of work — a photo, a graph, a written summary — included in a portfolio.
evidence of growth
Pairing an early piece of work with a later piece on the same skill to show improvement.
Tip: at the end of every lab, take 60 seconds to write the reflection. That tiny note becomes the most useful part of the entry months later when you cannot remember what happened.
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