Teacher Lesson Plan
St. Ed. Pg.
103
®
Common Core Standards Plus – Language Arts – Grade 3
Strand: Vocabulary Acquisition and Use
Focus: Affixes
Lesson: #5
Language Standard: L.3.4b: Determine the meaning of the new word formed when a known affix is added to
a known word (e.g., agreeable/disagreeable, comfortable/uncomfortable, care/careless, heat/preheat).
Lesson Objective: Students will be able to recognize the change in meaning of
words when an affix is added.
Introduction: “The meaning of a word changes when an affix is added to it. An affix
can be added to the beginning or end of a word to change its meaning.”
Instruction: “You might read a word that looks familiar to you, but when just a few
letters are added to it, it may become a completely different word. Today we are
going to see words that you already know, but we are going to learn how they change
when an affix is added. An affix added to the beginning of a word is called a prefix. A
suffix is an affix that is added to the end of a word. You probably know what the
word comfortable means. (Ask students for examples of definitions for comfortable.)
What happens to the word comfortable when we add the affix un to the beginning of
the word?” Students should recognize that the word becomes uncomfortable. Talk
with them about how that changes the meaning. Discuss the meaning of the prefix -un
(not).
Guided Practice: “Let’s practice using an affix together to change the meaning of a
word. If you see the word agreeable and you add the affix dis to the beginning of the
word, what is the new word?
Original word agreeable.
It means something is pleasant or enjoyable.
New word disagreeable.
What does the new word mean? ______________________.
What might the affix -dis mean? ________________________.”
Independent Practice: “Read the items that follow. For each word, write the
word that is formed when you add the given affix before or after the word. You will
then write what the new word means.”
Review: Review the correct responses together. Ask students to share the
definition of an affix. Ask them how a word can change just by adding an affix.
Closure: “By knowing and recognizing affixes, you can make a lot of new words
using words you already know.”
Answers: Answers for new word definitions will vary, but new words are:
1. impossible – not possible
2. friendless – no friends
3. overeat – consume too much food
4. rewrite – write again
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Strand:
Common Core Standards Plus – Language Arts – Grade 3
Vocabulary Acquisition and Use
Focus: Affixes
Lesson: #5
Language Standard: L.3.4b: Determine the meaning of the new word formed when a known affix is added to
a known word (e.g., agreeable/disagreeable, comfortable/uncomfortable, care/careless, heat/preheat).
Prefix – An affix added to the beginning of a word
Suffix – An affix added to the end of a word
Example: Original word agreeable
It means something is pleasant or enjoyable.
Write the new word adding the affix dis to the beginning of the word.
_____________________________
What does the new word mean? _____________________________
How did the word change when you added the affix? What might the affix dismean?
Directions: Read the items that follow. For each word, write the word that is
formed when you add the given affix before or after the word. You will then write
what the new word means.
1. Original word: possible
It means that something is able to be done.
Write the new word adding the affix -im to the beginning of the word.
________________________________
What does the new word mean? ________________________
2. Original word: friend
It may mean someone you know well or are fond of.
Write the new word adding the affix -less to the end of the word.
____________________________
What does the new word mean? ________________________
3. Original word: eat
It means to put in mouth, chew and swallow.
Write the new word adding the affix over- to the beginning of the word.
_____________________________
What does the new word mean? _________________________
4. Original word: write
It may mean to put words on a page.
Write the new word adding the affix re- to the beginning of the word.
_____________________________
What does the new word mean? _________________________
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231
Teacher Lesson Plan
St. Ed. Pg.
104
®
Common Core Standards Plus – Language Arts – Grade 3
Strand: Vocabulary Acquisition and Use
Focus: Affixes
Lesson: #6
Language Standard: L.3.4b: Determine the meaning of the new word formed when a known affix is added to
a known word (e.g., agreeable/disagreeable, comfortable/uncomfortable, care/careless, heat/preheat).
Lesson Objective: Students will be able to recognize the change in meaning of
words when an affix is added.
Introduction: Students will continue to use affixes to form new words and to
recognize how the words change with the addition of the affix. Reinforce that there
are many affixes and that you are just covering some of them here. The focus of the
lesson is that students recognize the changes made by the addition of an affix and that
they can determine the meaning of the new word.
Instruction: “Remember that an affix can be added to the beginning or end of a
word. By adding an affix, you can change the meaning of a word. Good readers look
for words, or even parts of a word, they recognize. Sometimes you can guess what
the affix means by looking at how it changes a word’s meaning.”
Guided Practice: “Let’s practice using an affix to change the meaning of a word.
If you see the word comfortable and add the affix -un to the beginning of the word,
what is the new word?
Original word care
It means to be concerned about.
New word careless
What does the new word mean? _______________________________.
What might the affix -less mean? ________________________________.”
Independent Practice: “Read the items that follow. For each word, write the word
that is formed when you add the given affix before or after the word. You will then
write what the new word means.”
Review: “How can knowing the definition of the word help you figure out what the
affix means?”
Closure: Ask a student to explain what an affix is, and tell students to note when
they see affixes in their own or other reading lessons that day.
Answers:
232
Answers for definitions may vary, but new words will include:
1. reheat – heat again – do again
2. unafraid – not afraid – not
3. joyful – full of joy – full of
4. tricycle, bicycle – two – three
© 2013 Learning Plus Associates – LIMITED DUPLICATION LICENSE GRANTED.
These materials may be printed for use in your classroom only. Further distribution of these lessons is prohibited by law.
Student Page
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Common Core Standards Plus – Language Arts – Grade 3
Strand: Vocabulary Acquisition and Use
Focus: Affixes
Lesson: #6
Language Standard: L.3.4b: Determine the meaning of the new word formed when a known affix is added to
a known word (e.g., agreeable/disagreeable, comfortable/uncomfortable, care/careless, heat/preheat).
Example: Original word care
It means to be concerned about.
New word: careless
What does the new word mean? _________________________
What might the affix -less mean? ________________________________
Directions: Read the items that follow. For each word, write the word that is
formed when you add the given affix before or after the word. You will then write
what the new word means.
1. Original word: heat
It means to make or become warm.
Write the new word adding the affix re- to the beginning of the word.
________________________________
What does the new word mean? ________________________
What might the affix re- mean? __________________________
2. Original word: afraid
It means scared or fearful of something.
Write the new word adding the affix un- to the beginning of the word.
______________________________
What does the new word mean? ______________________
What might the affix un- mean? ________________________
3. Original word: joy
It means happiness.
Write the new word by adding the affix -ful to the end of the word.
_____________________________
What does the new word mean? ________________________
What might the affix -ful mean? _________________________
4. Original word: cycle
It refers to something with a wheel.
Write the new word by adding the affix tri- to the beginning of the word.
___________________________________
Write the new word by adding the affix bi- to the beginning of the original
word.
_____________________________
What does the affix bi- mean? __________________________
What does the affix tri- mean? __________________________
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233
Teacher Lesson Plan
St. Ed. Pg.
105
®
Common Core Standards Plus – Language Arts – Grade 3
Strand: Vocabulary Acquisition and Use
Focus: Root Words
Lesson: #7
Language Standard: L.3.4c: Use a known root word as a clue to the meaning of an unknown word
with the same root (e.g., company, companion).
Lesson Objective: Students will know how to use a root word or base word as a
clue to help them figure out the meaning of a new word.
Introduction: “Today we will again be practicing using root words as clues to the
meanings of words we don’t recognize.” Remember to guide students so that they
circle the root word or part of the word that they recognize.
Instruction: “Today we will practice understanding new words based on the root
words that we recognize. Remember that sometimes you might see a word you have
never seen, but you can figure out what the word means by looking for a word or
part of a word that you recognize in the new word.”
Guided Practice: “We will practice doing one example together before you
complete the rest on your own. The rock was immovable; it was so heavy that no one
could make it budge. What part of the underlined word do you hear that you can
recognize? Let’s circle the mov in immovable. What does move mean? (Able to take
from one place to another.) If you know what move means, what do you think
immovable means?” Something that can’t be moved from one place to another.
Independent Practice: “On your page for each item, circle the root word or the
part of the word that looks familiar or resembles another word. Write the meaning
of the underlined word on the line provided.”
Review: “Were you able to find root words in each of the underlined words? Share
the words you circled for each.” Review each item together.
Closure: “Remember to look for root words in words that you don’t recognize.
Sometimes they may just be part of a word (mov in immovable, for example, instead of
move).”
Answers:
234
1.
2.
3.
4.
feeling of being very light (weight)
a place in which to watch or view things (observe)
being finished (complete)
unusual, not normal (normal)
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Common Core Standards Plus – Language Arts – Grade 3
Strand: Vocabulary Acquisition and Use
Focus: Root Words
Lesson: #7
Language Standard: L.3.4c: Use a known root word as a clue to the meaning of an unknown word
with the same root (e.g., company, companion).
Example: The rock was immovable; it was so heavy that no one could
make it budge.
What does the word immovable mean? _____________________
Directions: Circle the root word or the part of the word that looks
familiar or resembles another word. Write the meaning of the underlined
word on the line provided.
1. Sarah felt weightless when the roller coaster ride went quickly from
the top of the hill to the bottom.
What does weightless mean? __________________________
2. They all got together in the observatory to view the stars.
What does observatory mean? __________________________
3. After the completion of his chores, Nathan went outside to play.
What does completion mean? __________________________
4. There was a substitute in class, and the behavior of the students was
abnormal.
What does abnormal mean? ___________________________
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235
Teacher Lesson Plan
St. Ed. Pg.
106
®
Common Core Standards Plus – Language Arts – Grade 3
Strand: Vocabulary Acquisition and Use
Focus: Root Words
Lesson: #8
Language Standard: L.3.4c: Use a known root word as a clue to the meaning of an unknown word
with the same root (e.g., company, companion).
Lesson Objective: Students will know how to use a root word as a clue to help
them figure out the meaning of a word.
Introduction: “Today we will practice using a root word or base word as a clue to
help us figure out words we don’t know or recognize.”
Instruction: “A root word is a word in its original form before any affixes are
added. Remember that we have learned how to change a word by adding an affix.
Today we will read words and circle the root word in each. We will use the part of
the word that looks familiar or resembles another word to determine the meaning of
the word.”
Guided Practice: “Let’s do an example together. She gave a factual account of the
events. If we look at the first part of the word factual, we can see the word fact.
Circle fact. That’s the part of the word that gives you a clue to what the word means.
What do you think the word factual means? Write the meaning of factual on the line.”
(What actually happened.)
Independent Practice: “Read the sentences on your page. Circle the root word
or the part of the word that looks familiar or like another word. Write the meaning
of the word on the line provided.”
Review: Review the items together. “Sometimes if you see a word you don’t know
you can make a good guess of what it means if you recognize part of a word that you
already know.”
Closure: “Today we learned how to figure out the meaning of unknown words by
finding the root words and using them as clues to the meaning of the words.”
Answers:
236
Answers may vary.
1. able to be stretched (elastic)
2. at risk of extinction, in danger of being extinct (danger), in
danger
3. not real, made up (fiction)
4. often, a lot (frequent)
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Student Page
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Common Core Standards Plus – Language Arts – Grade 3
Strand: Vocabulary Acquisition and Use
Focus: Root Words
Lesson: #8
Language Standard: L.3.4c: Use a known root word as a clue to the meaning of an unknown word
with the same root (e.g., company, companion).
A root word is a word before a suffix or prefix is added.
Example: She gave a factual account of the events.
Factual means ___________________.
Directions: Circle the root word or the part of the word that looks familiar or
resembles another word. Write the meaning of the underlined word on the line
provided.
1. The elasticity of her shorts had worn out, so her pants fell down.
Elasticity means ___________________.
2. The zookeeper was sad because the monkeys were endangered.
Endangered means ________________________.
3. Taylor knew that the book was fictitious because it was about dogs that could fly
and talk to people.
Fictitious means ____________________.
4. She went to the park with frequency because she loved playing on the
playground.
Frequency means ____________________.
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237
Teacher Lesson Plan
St. Ed. Pg.
107
®
Common Core Standards Plus – Language Arts – Grade 3
Strand: Vocabulary Acquisition and Use
Focus: Roots and Affixes
Evaluation: #2
The weekly evaluation may be used in the following ways:
 As a formative assessment of the students’ progress.
 As an additional opportunity to reinforce the vocabulary, concepts, and
knowledge presented during the week of instruction.
Standards: L.3.4b Determine the meaning of the new word formed when a known
affix is added to a known word (e.g., agreeable/disagreeable, comfortable/uncomfortable,
care/careless, heat/preheat).
L.3.4c Use a known root word as a clue to the meaning of an unknown word with the
same root (e.g., company, companion).
Procedure: Read the directions aloud and ensure that students understand how to
respond to each item.
 If you are using the weekly evaluation as a formative assessment, have the
students complete the evaluation independently.
 If you are using it to reinforce the week’s instruction, determine the items that
will be completed as guided practice, and those that will be completed as
independent practice.
Review: Review the correct answers with students as soon as they are finished.
Answers:
238
1. (L.3.4b) bravest; most brave; bravest of all; est means the most
2. (L.3.4b) immature; not acting your age; im means not
3. (L.3.4c) being treated equally; treated the same (students should
circle equal).
4. (L.3.4c) someone to be with; a friend to prevent loneliness
(students should circle companion)
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Common Core Standards Plus® – Language Arts – Grade 3
Strand: Vocabulary Acquisition and Use
Focus: Roots and Affixes
Evaluation: #2
Prefix – An affix added to the beginning of a word
Suffix – An affix added to the end of a word
Root word – A word before a suffix or prefix is added
Directions: Read the items that follow. For each word write the new
word that is formed when the affix you are given is added before or after
the word. You will then need to write what the new word means.
1. Original word: brave
It means not afraid or courageous.
Write the new word adding the affix -est to the end of the word.
________________________________
What does the new word mean? ________________________
What might the affix -est mean? _____________________
2. Original word: mature
It means acting appropriately for your age.
Write the new word adding the affix im- to the beginning of the
word. _________________________________________
What does the new word mean? _____________________
What might the affix im- mean? ________________________
Directions: Circle the root word you recognize or the part of the word
you recognize in the underlined word, and write the meaning of the
underlined word on the line provided.
3. The group was marching in front of the White House demanding
equality for all people.
Equality means ______________________.
4. Because she lived alone, Mrs. Foster got a dog for companionship.
Companionship means ________________________.
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