Lesson Exemplar — Science 10

Term 1 · Week 2 · Day 1 · Domain: Earth and Space Science

This is one day. For the whole of Week 2 in the format DepEd prescribes for filing, see lesson-plan-ilaw.md.

I. CURRICULUM CONTENT, STANDARDS, AND LESSON COMPETENCIES

A. Content Standards

Quoted from the curriculum guide (DepEd, August 2023, p. 61), Grade 10 Quarter 1, content standard 2:

Plate movements and continental evolution account for the major surface features of the Earth.

B. Performance Standards

By the end of the Quarter, learners describe and explain the geologically dynamic nature of the Philippine Archipelago in relation to its plate tectonic setting and use models to explain the earth structures, movements, and natural events that occur.

C. Learning Competency

CG Quarter 1, competency 2:

describe the structures, movements and events that occur at each type of plate boundary.

Read each type strictly. Three boundary types, and one of them — convergent — behaves in three different ways depending on what kind of crust is arriving. A learner who can name the three types and describes only one kind of convergence has met about half of this competency.

By the end of the session, learners can:

1. name the three boundary types and say which way the plates move at each;
2. for a given boundary, name the structure formed, the movement, and the events;
3. distinguish ocean–continent, ocean–ocean and continent–continent convergence, and say why they build different things; and
4. state that the asthenosphere is solid rock that flows, not liquid magma.

D. Key Vocabulary

⚠️ The word plate is a flat dish in ordinary English, and every learner pictures one. Ten seconds naming that on Day 1 saves an argument later, because a dinner plate is thin, rigid and floats in a sink — two of those three are right and the floating one is the misconception.

The class sentence, said in §D and printed on the wall chart: "Ask which way. Then ask what crust. The structure follows."

E. Integration Across Learning Areas

II. MATERIALS

Needed — no cost. Two sheets of paper and two hardback books. That is the entire apparatus and it models all four cases. Chalk and a board.

Useful and not needed. A bowl of water and a candle stub for the convection model in the enrichment column. A wall map showing the world's plate boundaries.

Not used: a plastic tectonics kit, coloured modelling clay, or a purchased model. Paper and books are available in every classroom, every learner can do it at their own desk at the same time, and the paper visibly buckles and visibly slides — which a clay slab does not.

In addition. slides.html slides 1–13 · worksheet.html · game.html Rounds 1–2 · wall-chart.html

III. TEACHING AND LEARNING PROCEDURE

A. Activating Prior Knowledge · 6 minutes

Slide 2. Read the curriculum guide's own phrase for this country, and let it sit:

"A geologically dynamic archipelago."

Then unpack it as fact, briefly: volcanoes along its length. A fault system running nearly end to end. Earthquakes recorded continuously, most of them too small to feel.

Ask: "Why here, and not everywhere?"

Take three or four answers and write them on the board. Do not settle it. Most classes offer because we are on the ring of fire, which is a name rather than an explanation, and it is worth saying so gently: "That is what it is called. It is not why it happens."

Say: "Week 1 you learned that the plates move, and how we measure it. This week is what happens where two of them meet. Next week you will put this country on a map and read it. Today you build the tool that reads the map."

B. Establishing Lesson Purpose · 3 minutes

Slide 3. Write three words on the board and leave them up for the whole week:

APART · TOWARD · PAST

Say: "Two plates can move apart, move toward each other, or slide past each other. That is the complete list. Every boundary on Earth is one of those three, and there is no fourth."

Then the honest warning: "Two of those three are easy. One of them is not, and the hard one is where the marks are."

C. Developing and Deepening Understanding · 26 minutes

C1 · Apart — divergent · 5 minutes

Slide 4. Two books flat on the desk, side by side, touching. Slide them apart slowly and let the class see the gap open.

Ask: "The gap cannot stay empty. What fills it?"

Molten rock rises from below and cools. New crust is made — and this is the only place on Earth where that happens.

Slide 5. Give the evidence, because it is unusually clean: the sea floor is youngest at the ridge and gets older with distance, symmetrically on both sides. Nothing but spreading produces a mirror image.

Then ask the bridging question and wait for it: "New crust is being made here. The Earth is not getting any bigger. So what must be happening somewhere else?"

C2 · Toward — and it depends what is arriving · 11 minutes

Slide 6. Say plainly: "This is the hard one. Convergent is not one thing. It is three, and which one you get depends entirely on what kind of crust is arriving."

Put the two kinds on the board:

• Oceanic crust — thin and dense.
• Continental crust — thick and light.

Now run two models back to back. Every learner does them at their own desk.

Model one — continent meets continent. Two sheets of paper, edge to edge, flat on the desk. Push them together slowly.

The paper buckles upward into a ridge. Nothing goes down.

Slide 9. Say: "Both sides are thick and light. Neither one will sink. So both crumple upward, and you get the highest mountains on Earth — with no trench and no volcanoes. That is the Himalayas, and the guide names them."

Ask, and let the discomfort land: "This is a convergent boundary. Where is the trench?"

Model two — ocean meets continent. One sheet of paper flat, a book resting on one end of it. Push the paper toward the book.

It slides underneath. That is subduction.

Slides 7 and 8. Say: "The thin dense one goes under, every time. As it goes down it heats, water comes out of it, and rock above it melts and rises. That is where the volcanoes come from."

These eleven minutes are the lesson. Everything before this is two easy cases and everything after it is consolidation. If the class leaves believing convergent means trench, the week has failed regardless of what else was covered — and it is a belief they will arrive with, because every textbook diagram of a convergent boundary has a trench in it.

C3 · Past — transform · 4 minutes

Slide 10. Two books side by side. Press them together and slide one past the other.

They stick. Then they jump.

Say: "Nothing is made. Nothing is destroyed. And that is exactly why people think nothing happens here."

Say: "Shallow means close to the surface. Close to the surface means close to where people live. Building nothing and doing nothing are different things."

C4 · What are they moving on? · 6 minutes

Slide 12. Ask the question directly: "All this time the plates have been moving. What are they moving on?"

Most classes answer liquid magma. Write it on the board and then take it apart:

The asthenosphere is solid rock.

Say: "It flows. Very, very slowly. Glacier ice flows downhill for years and stays solid the whole time — this is the same thing, far slower and far hotter."

Then give the evidence, which the class already owns from Grade 9 Quarter 2:

Ask: "If it were liquid, what would happen to an earthquake wave passing through it?"

S-waves cannot travel through a liquid. They cross the asthenosphere. Therefore it is not liquid.

Say: "Magma is real. It is made in particular places, in small amounts, mostly at boundaries. It is not a layer and there is no ocean of it."

D. Making Generalisations · 6 minutes

Slide 11. Put the whole thing on the board once and have learners copy it into their notes by hand:

Slide 13. Bring it home. The guide names the Philippine Plate and asks learners to predict where this archipelago will be in 50 million years from its measured velocity. Ask: "Which of the three is doing this to us?" Convergence — and a major fault system as well. Week 3 puts it on a map.

Slide 14. Give the four questions and insist on the order:

1. Which way are the two plates moving?
2. What kind of crust is on each side?
3. What structure does that build?
4. What events happen there?

Say: "Question 2 is the one you will skip, and it is the one that decides the answer."

Slide 15. Say the class sentence together, twice:

"Ask which way. Then ask what crust. The structure follows."

Hand out worksheet.html.

IV. EVALUATING LEARNING

A. Assessment · 4 minutes

Exit ticket, three lines.

1. Name the three boundary types and say which way the plates move at each.
2. Two continental plates converge. What forms?
3. The plates move on the asthenosphere. Is it liquid? How do you know?

Item 2 is the one that reads. Item 1 is on the wall chart by Tuesday and item 3 is a single sentence.

B. Teacher Reflection

1. Record the count from §C2: how many learners, when asked where the trench was in the continent–continent model, could not answer? That number is the lesson, and a low count usually means the question was asked in a way that gave the answer away.
2. Did the class do both paper models themselves, or watch you do them? A class that watched will answer item 2 correctly on Monday and wrongly on Friday.
3. How many said liquid magma before slide 12? Whatever the number, do not treat it as carelessness — it is in a great many published diagrams, drawn in orange.

C. Enrichment and Remediation

Anticipated Misconceptions

If There Is No Electricity

Nothing here needs it. Two sheets of paper, two books and a board are the whole apparatus, and §III carries everything that is on the slides.

If there are no hardback books, two exercise books or two flat stones will slide past each other just as well; if there is no spare paper, two learners' hands, palm to palm, buckle upward when pushed together and show the continent–continent case exactly. The models are not optional — they are the only part of this lesson that beats the textbook diagram everybody has already seen.

Part of the E-turo MATATAG artifact set. Companion files: syllabus.md · lesson-plan-ilaw.md · assessment.md · offline-activities.md