Rocket sets a cardboard model of the skate ramp on the Signal Desk. It has two sides and a painted line.
"This week I explain the ramp," he says. "Everything about it. Every board."
Raven lays three rows of index cards beside the model. "Everything is not a topic. What do you notice about these cards?"
Rocket reads them. "Your notes. The two sides, the rules, the drain, the tarp."
"Facts," Raven says. "An explanation is built from facts you can point to, not from everything you remember."
Nova hovers over the first row of cards, her light steady. "Start with one sentence that tells the reader what you will explain," she says. "The rest will line up behind it."
An explanatory text teaches a reader about a topic. It does not tell a story, and it does not argue for one side. It explains.
The topic sentence tells the reader what the piece is about and hints at how it will be organized.
Raven thinks aloud: "The mentor text says every part of the Signal Desk has a job. So I know the piece will go part by part, and each part will get its job explained."
This week you write your own explanatory text about the skate ramp. Every fact comes from Raven's notes below, and nowhere else.
This explainer ran in this week's Signal. Its first sentence is the topic sentence.
These are Raven's notes about the skate ramp. Your explainer this week uses only facts from these notes.
| About explanatory writing | True or false? |
|---|---|
| An explanatory text teaches a reader about a topic. | ? |
| An explanatory text should argue that the reader must agree. | ? |
| The topic sentence can hint at how the piece is organized. | ? |
| Facts in your ramp explainer may come from anywhere you like. | ? |
Topic chosen, first sentence written. Tomorrow you turn the three groups into three sections.