Bell ringer: start here (while attendance happens)
Source evaluation · 10 min

Handout on your desk: Two texts, one topic. Both answer the same question, why does a growing city flood more.
Task: Read both, then answer Part 1 on the handout. For each text, decide whether it was written by a person or with AI, name the specific sentence or feature that made you decide, and say how sure you are about each one. Four minutes, on your own, no talking yet. Write on the handout: your Class Notebook does not exist until later today. Stop at the bottom of Part 1. Do not turn the page until you are told.

Today we are learning

I can name the four OPVL letters and what each asks of a source.

I can: tick as you go (for you, not for marks)
full course map →

What today is about

Two questions run this course: one for the whole year, one for this unit.

The year's question is How do you live well on a changing Earth? Every unit comes back to it. This unit's question is How do scientists know what they know, and how should we know what we know? For the next seven blocks, that is the one doing the work.

The anchor skill for the whole year is OPVL: Origin, Purpose, Value, Limitations. It's the framework you'll apply to every paper, news article, government report, and AI output we touch this year. We learn it here first, and we come back to it in every later unit at increasing difficulty.

Everything in this class is a routine you'll meet again. The full list lives at How This Class Works.

Before you start the work

Use all of these. Today's material is foundational, so nothing here substitutes for anything else; take them in whatever order class time allows. Notes go in your Field Notebook today and move into your Class Notebook once you set it up later this block; from Block 2 on, Power Notes go straight into the Doc.

Taking notes? Power 1 seeds for today
the course's four threads · OPVL · AI's real-world footprint · the format
Watch
How this course works: the block rhythm, the two notebooks, and where to find things on this site. Opens in a new tab.
Read
The Rubric: K/U, T/T, and C explained in student-facing language with band descriptors.
Placeholder
Interact
TBD: whole-class live poll asking "What makes a source trustworthy?" Anonymous Mentimeter or similar.

Everyone does this

Six words you need today

Not a list to memorise. Each of these has a moment in today's block where you will actually meet it, and that moment is named so you can catch it when it arrives.

  • source: anything you get information from. A paper, a news article, a person, a photograph, an AI.
    Today: all of it. You will judge four different sources before you leave.
  • primary source: original evidence, made at the time by the people who were there or who did the measuring.
    Today: the UNU report. It holds the actual numbers.
  • secondary source: someone else's summary or interpretation of primary sources.
    Today: the AP article. It reports on the UNU report, so you are reading about the numbers rather than reading the numbers.
  • OPVL: the four questions this course asks of every source. Origin, Purpose, Value, Limitations.
    Today: the whole-class work on the AP article, and the exit ticket asks you to name all four.
  • bias: a leaning that shapes how a source presents information. Every source has some, so the useful question is which way it leans and how much.
    Today: the AP article quotes industry voices saying the cost is worth it. Careful, "it might be biased" on its own is not a Limitation. Which way, and because of what?
  • disclosure (AI): telling your reader how and where you used AI.
    Today: the handout on your desk. One of those two texts came with a disclosure statement and one did not.
What to do with them
  1. Now, in your Field Notebook, two minutes. Write the six words down the margin. Next to each, one line: what you think it means. Guess. Nobody collects this and being wrong now is the point.
  2. During the block. When a word turns up, tick it. If what it turned out to mean was different from your guess, star it instead. The stars are the ones worth keeping.
  3. Once your Class Notebook exists, later this block. These six words are your first entry, written as Power Notes under today's entry header.

Power Notes work for vocabulary because the shape already fits: the word is a Power 1, the meaning in your own words is a Power 2 (a Power 2 is a definition), and where you met it is a Power 3 (a detail underneath). So this entry is you rehearsing the format on six words you already met, before Block 2 asks you to use it on a research paper.

Topic: Vocabulary, U0 B1
1. secondary source
2. someone else's write-up of evidence they did not gather themselves
3. met it: the AP article, reporting numbers the UNU report measured
1. bias
2. the lean in how a source tells it, not the same as being wrong
3. met it: the industry voices in the AP article saying the cost is worth it

One rule for the Power 2 line: it has to be in your own words. If it matches the handout word for word you have copied, not learned. The Power 3 line is the one that shows you were actually here today.

Vocabulary support
The six above are today's. The U0 pre-teach has all 15 terms for this unit, each with a definition, a visual cue, and a sentence stem you can build an answer from.

Today's work: first OPVL together

Teacher-led whole-class activity. No choice board today. We do this together first, so you can hear what the thinking sounds like before you try it alone.

Learning Intention: I can name the four OPVL letters and what each asks of a source.
OPVL quadrant: Origin asks who made this, when, and what kind of thing it is; Purpose asks why it exists and for whom; Value asks what it is genuinely good for answering; Limitations asks what it cannot tell you.
Finish the handout (about 20 minutes)

Straight on from the bell ringer, with the handout still in front of you.

  1. With a partner: did you mark them the same way? Where you disagree, whose evidence is harder to argue with, and why?
  2. Between you, list every feature you believe is a reliable sign that a human wrote something. Be specific. "It sounds natural" is not a feature.
  3. Stop there. We put the tallies and your lists on the board together before anyone turns a page.
  4. On the cue, Part 2. You get the second sheet then: read what each author said about AI use, answer the three questions, then stop again.
  5. On the second cue, Part 3.

The question we land on together, and the one Part 3 asks: when you cannot tell by reading, what is left?

The source we OPVL together
Seth Borenstein, 'Energy, water use and pollution of AI and data centers rival most countries' (AP News, June 2026). A UN report says the infrastructure behind AI uses electricity and water at the scale of entire countries; industry voices in the same article say it's worth it. We work through OPVL on this together, including on the tools this course itself uses. Printed excerpt (about 400 words) provided in class; full article linked. If you want the primary source the article summarizes, the selected key points from the UNU-INWEH report are on this site. Comparing how OPVL changes across source types is Block 2; today is one source, done properly.
Bar chart from UNU report data: data centers used 448 terawatt-hours of electricity in 2025 with AI's share at 20 percent, projected to reach 945 terawatt-hours by 2030 with AI's share at 40 percent; a dashed reference line marks the annual residential electricity of all of Sub-Saharan Africa, about 172 terawatt-hours.
Drawn only from numbers in the UNU report (pp. 8–10), which means you can check every part of this chart against the source. Try.
Set up your Class Notebook (10 min, today)

You have two notebooks and they do different jobs. Ms. Jayanthi/Mr. Ignash handed you the paper Field Notebook at the start of class: put your name on the front, and it takes your bell ringers and your sketches from here on. The Class Notebook is a Google Doc you make once, today, and it takes your Power Notes and the header line that indexes the year.

Set the Doc up now, following the setup steps at Your Two Notebooks: name it, share it once, turn the outline on, and add the linked table of contents. Then write today's first entry under the header line printed at the end of this section.

Open your Class Notebook and type today's entry header as Heading 2:

A: Aug 10 | U0 B1 | Welcome + How We WorkB: Aug 11 | U0 B1 | Welcome + How We Work

What you're submitting today

Exit ticket: quick and formative. Not part of the Source Dossier grade yet.

Exit ticket (submit by end of class)

Name one OPVL letter you feel confident about after today's discussion, and one you want to practice more. Two sentences.

Submit via Google Classroom (link posted in August)

Rubric link: Today is formative; there is no scored band. We're building the K/U vocabulary the rubric uses. See the full rubric for what K/U bands look like once we're scoring.

One question before you leave

Three to five minutes. Your answer is saved to your reflection journal, where you can read back everything you have written this year.

No grade. Save it; we'll come back to this source in Block 4.

Today's reflection is in Google Classroom, under Reflection Journal.

Link posted in August

Sign in with your school account. Your teacher can see what you write here.