Island Stories

I want to focus on the Hawaiian Islands. Geologists are scientists who study the Earth and believe that millions of years ago, a crack opened up under the ocean. Hot, liquid lava poured out from inside the earth. Slowly, the outside layers of the Earth, called plates, were moving. The plates near Hawaii were moving northwest. It was moving over this hot spot. The lava from this hot spot formed the island. Contrary to the Hawaiians of old, they believed in many gods. To them, the gods created the islands. They believed the islands were born to Wakea, the sky father, and Papa, the earth mother. The islands are the children of the gods. - We will also focus on the stages of growth of the islands, including erosion, coral, waves, weather, and the effects on the islands. Emphasis will be placed on individual islands and the effects of the elements. We will also cover how the native plants were brought to the island, if not by people. Then we will look at the first settlers of the islands, the plants and animals they brought with them, and the plants and animals native to Hawaii.

Overview

Today students will read and use informational text to understand how the Hawaiian Islands formed and how erosion, waves, weather, and coral affect island growth. Students will also connect the geological story to the role of plants and animals (brought by people and by nature).

Learning intentions

Students will be able to identify the main idea of an informational text about the Hawaiian Islands.
Students will be able to describe key details that support the main idea.
Students will be able to explain how events and processes happen over time (how islands form and change).
Students will be able to describe cause-and-effect relationships affecting island growth and erosion.
Students will be able to compare information from two short texts on the same topic (island formation and island life).

Success criteria

I can tell the main idea of the text in one or two sentences.
I can find key details that support my main idea and point to the text.
I can explain the process of island formation and at least two ways the islands change over time.
I can use evidence to describe how people and nature helped plants and animals arrive on the islands.

Curriculum links

CCSS.ELA-LITERACY.RI.4.2 (main idea and key details; summarize)
CCSS.ELA-LITERACY.RI.4.3 (explain what happened and why using specific information)
CCSS.ELA-LITERACY.RI.4.5 (describe overall structure such as cause/effect and chronology)
CCSS.ELA-LITERACY.RI.4.10 (read and comprehend informational texts with scaffolding)

Lesson structure (40 minutes)

0–5 min · Hook (big idea). Teacher shows a simple “island change” picture set (lava forming an island, waves eroding, coral building, weather effects) and asks: “What do you think is happening over a long time to make islands change?” Students do a quick turn-and-talk, then share one idea.
5–12 min · Mini-lesson: main idea + process. Teacher reads aloud a short informational passage about the hot spot, plates moving northwest, and how lava forms islands, stopping to highlight main idea and key details. Students underline one sentence that seems like the main idea and circle two supporting details.
12–22 min · Guided reading: cause and effect. Teacher provides a second short passage focused on stages of growth and change: erosion, coral, waves, weather, and how elements affect islands; includes a paragraph about native plants arriving (by people and sometimes by nature). Students work in pairs using a “Cause → Effect” chart:

Teacher prompts students to write causes (waves, weather, erosion, coral) and effects (changing shorelines, building reefs, shaping land).
Students complete at least 3 cause/effect pairs with evidence from the text.

22–30 min · Two-text comparison (island life). Teacher gives a third short text snippet (settlers and what they brought: tools, plants, animals; and what is native to Hawaii) and asks students to connect it to the earlier island-change passage. Students record: “Text 1 tells how islands form/change; Text 2 tells how island life developed.” Then they choose one detail from each text and write a single comparison sentence.
30–38 min · Evidence-based explanation (constructed response). Teacher models a 3–4 sentence response frame:

“The Hawaiian Islands formed because…”
“As time passed, plates moved…”
“The islands grew/changed due to…”
“This connects to island life because…” Students independently write their response, using at least two pieces of evidence (details) from the passages.

38–40 min · Exit ticket (quick check). Students answer: “What is the main idea of today’s texts, and name one key detail that supports it.” Teacher collects for formative assessment.

Resources

2–3 short grade-4 informational text excerpts (teacher-prepared handouts) on:
Hot spot and plate movement forming islands
Erosion, waves, weather, coral and island growth stages
First settlers, plants/animals they brought, and native Hawaiian plants/animals
Main idea/key details graphic organizer
Cause → Effect chart (waves/erosion/weather/coral → effects)
Two-text comparison sentence stem strip
Student response sheet with the 3–4 sentence frame
Pencils and highlighters
Projected images or printed picture cards showing island formation and erosion/coral

Assessment

Formative: teacher circulates during underlining/circling of main idea and supporting details.
Formative: review completed Cause → Effect charts for accuracy and evidence.
Exit ticket: check for main idea + at least one supporting key detail.

Differentiation

Support: provide sentence starters for cause/effect (“Waves cause… because the text says…”), comparison (“Both texts mention…”), and writing (“One key detail is…”).
Support: allow students to use a word bank (hot spot, plates, northwest, erosion, coral, waves, weather, settlers, native).
Extension: challenge students to add a fourth cause/effect pair or write an additional sentence explaining “what happened and why” for one process.
EAL/SEN: offer a read-aloud option for each excerpt and allow partner responses before independent writing; reduce writing load to “two sentences” if needed while keeping evidence requirements.

Teaching Instructions