👩‍🏫 Teacher’s Guide

Objective
Students will apply prefix sub using the examples and practice below.

Vocabulary
submarine, subsoil, subzero

Teaching Notes

• Model one response, then ask students to work independently and explain their choices with specific words or evidence.
• Teach the rule, discuss the worked example, and cover answers during practice.
• Use incorrect responses to identify which part of the rule needs another example.
• Allow approximately 25–35 minutes, including discussion and independent practice.

🧒 Student Worksheet

Concept and Helping Material

Big Idea
A prefix is added to the beginning of a base. In these examples, sub contributes the meaning "under." Word parts are clues; always check the whole word in context.

Word study

• submarine: a vessel that travels underwater
• subsoil: soil below the surface layer
• subzero: below zero

Model
Read the first example. Identify the word part, explain the whole word, and test the meaning in a sentence.

Vocabulary and Definition

• — a vessel that travels underwater
• — soil below the surface layer
• — below zero

Words to Learn

submarine, subsoil, subzero

Sentences to Fill In

1. The term for a vessel that travels underwater is ____.
2. The term for soil below the surface layer is ____.
3. The term for below zero is ____.

Think & Respond Q&A

1. What does submarine mean?
2. Which word means "a vessel that travels underwater"?
3. What does subsoil mean?
4. Which word means "soil below the surface layer"?
5. What does subzero mean?
6. Which word means "below zero"?
7. Use one practice word in a sentence that shows its meaning.

Hands-On Experiment or Activities

Make matching word and meaning cards. Match each pair, then group words with the same word part. Explain how the part affects the meaning. Check any spelling change when the part is added.

Reflection

• Explain one thing you learned.
• Write a short paragraph applying the skill. Underline your evidence or target words and explain one choice.