Objectives (5 - 7 minutes)

1. Understand the concept of prefixes and suffixes in English: Students should be able to understand what prefixes and suffixes are, and how they are used to form new words in English. This includes recognizing that a prefix is a letter or group of letters added at the beginning of a word to change its meaning, and that a suffix is a letter or group of letters added at the end of a word to change its meaning.

2. Recognize the most common prefixes and suffixes in English: Students should be able to identify the most commonly used prefixes and suffixes in the English language. This involves memorizing a list of prefixes and suffixes and practicing identifying them in different words.

3. Apply the knowledge of prefixes and suffixes in reading and writing: Students should be able to use the acquired knowledge about prefixes and suffixes to decipher the meaning of new words and to create new words. This includes the ability to break down words into their constituent parts (prefix, root, suffix) and to use this information to understand the word's meaning.

Secondary Objectives:

• Improve English fluency: As the study of prefixes and suffixes involves reading and writing many words, students will have the opportunity to practice and improve their English fluency.

• Develop critical thinking skills: Students will be challenged to think critically and analytically when trying to decipher the meaning of new words based on their knowledge of prefixes and suffixes.

Introduction (10 - 15 minutes)

1. Review of prior knowledge: The teacher starts the lesson by reminding students about the concept of words in English and how they are formed by letters. The teacher may ask students to give examples of words they know that have parts added to them, similar to the games 'guess the word' or 'word formation'. This activity aims to prepare students for the new concept to be learned - prefixes and suffixes.

2. Problem-solving situations: The teacher then presents two problem-solving situations:

   • 'If we add the letter 'un-' to the word 'happy', what happens to the word's meaning?'
   • 'If we add the letter '-er' to the word 'teach', what happens to the word's meaning?'

3. Contextualization: The teacher explains that English has many prefixes and suffixes that can be added to words to change their meaning. This is one of the reasons why English has so many words, as a small number of root words can be combined with many different prefixes and suffixes to form a wide variety of words. The teacher can give examples of common words formed by adding prefixes and suffixes, such as 'unhappy', 'teacher', and 'happier'.

4. Capturing students' attention: To illustrate the importance of prefixes and suffixes, the teacher may present some curiosities, such as:

   • 'Did you know that the word 'unbelievable' can be divided into three parts: 'un-', 'believe', and '-able'? The part 'un-' means 'not', 'believe' means 'to believe', and '-able' means 'able to'. So, the word 'unbelievable' means 'not able to believe' or 'incredible'.
   • 'What if I told you that the word 'antidisestablishmentarianism', which is famous for being one of the longest words in the English language, is formed by four parts: 'anti-', 'dis-', 'establishment', and '-arianism'? The word 'anti-' means 'against', 'dis-' means 'not', 'establishment' means 'system', and '-arianism' is a suffix that means 'belief or practice'. So, the word 'antidisestablishmentarianism' means 'belief or practice against the system'.

Development (20 - 25 minutes)

1. Theory explanation (10 - 12 minutes):

   • Definition of Prefixes and Suffixes: The teacher begins the theory explanation by defining prefixes and suffixes. He explains that a prefix is a group of letters added at the beginning of a word to alter its meaning, while a suffix is a group of letters added at the end of a word to alter its meaning.
   • Examples of Prefixes and Suffixes: The teacher presents a list of examples of prefixes and suffixes, along with their definitions. For example, he may include the prefix 'un-', which means 'not' (as in 'unhappy' - not happy), the prefix 're-', which means 'again' or 'anew' (as in 'redo' - do again), and the suffix '-er', which indicates 'someone who does' (as in 'teacher').
   • Formation of New Words: The teacher explains that by adding a prefix or suffix to a word, a new word is formed. He gives examples of how the word 'friend' can become 'unfriend' (not a friend) by adding the prefix 'un-', and how the word 'beauty' can become 'beautiful' (beautiful) by adding the suffix '-ful'.
   • Division of Words into Prefix, Root, and Suffix: The teacher teaches students how to divide words into their constituent parts - prefix, root, and suffix. He explains that the root is the central part of the word that contains its main meaning, while the prefix and suffix are added to the root to form a new word. The teacher gives examples of how to divide words, such as 'unhappiness', which is divided into 'un-', 'happy', and '-ness'.

2. Practical Activity 1 - 'Create a New Word' Game (5 - 7 minutes):

   • Instructions: The teacher divides the class into small groups and provides each group with a list of prefixes and suffixes. The challenge is for each group to create as many new words as possible by adding the prefixes and suffixes from the list to a root word. For example, if the root word is 'play', and the list includes the prefix 're-' and the suffix '-er', students can create the words 'replay' and 'player'.
   • Objective: The objective of this activity is to encourage students to apply what they have learned about prefixes and suffixes in a creative way, while practicing writing and word formation.

3. Practical Activity 2 - Reading Comprehension Exercises (5 - 6 minutes):

   • Instructions: The teacher distributes a series of sentences or short texts to the students. Each sentence or text contains at least one word with a prefix or suffix. Students must identify the words with prefixes and suffixes and explain what adding the prefix or suffix does to the word's meaning.
   • Objective: This activity aims to enhance students' ability to recognize and understand the use of prefixes and suffixes in reading, as well as improve their reading comprehension skills.

4. Practical Activity 3 - Word Puzzle (5 - 7 minutes):

   • Instructions: The teacher provides students with a series of words that have been divided into prefix, root, and suffix. Students must rearrange the parts to form the correct words. For example, if the given word is 'un-', 'happiness', '-ness', students must rearrange the parts to form the word 'unhappiness'.
   • Objective: This activity is a critical thinking exercise that helps students practice dividing words into their constituent parts and apply their knowledge of prefixes and suffixes to form words.

Feedback (8 - 10 minutes)

1. Group Discussion (3 - 4 minutes):

   • Sharing Experiences: The teacher gives each group the opportunity to share the words they created in the 'Create a New Word' game. Each group should explain how they arrived at the word, highlighting the prefix or suffix they used and the meaning it added to the root word. This discussion allows students to see different ways of applying knowledge of prefixes and suffixes and helps reinforce learning.

2. Connection to Theory (2 - 3 minutes):

   • Guided Discussion: The teacher then leads a discussion on how the practical activities connect with the theory presented. He questions students on how they applied the knowledge of prefixes and suffixes in forming new words and in dividing words into their constituent parts. The teacher may also ask students to give examples of words they found in the reading comprehension exercises and explain the meaning of the prefixes and suffixes in those words.

3. Individual Reflection (1 - 2 minutes):

   • Reflection Moment: The teacher then asks students to reflect individually on what they learned in the lesson. He asks questions like:
     1. 'What was the most important concept you learned today?'
     2. 'What questions have not been answered yet?'
   • Sharing Reflections: The teacher gives some students the opportunity to share their reflections with the class. This can help identify areas that need further clarification and consolidate what has been learned.

4. Feedback and Closure (2 - 3 minutes):

   • Teacher's Feedback: The teacher provides feedback to students on their performance during the lesson, highlighting strengths and areas that need improvement. He also answers any unanswered questions and clarifies any confusing concepts.
   • Lesson Closure: The teacher concludes the lesson by reinforcing the importance of prefixes and suffixes in the English language and encouraging students to continue practicing their reading and writing skills with words containing prefixes and suffixes. He may also suggest additional study activities, such as creating flashcards with prefixes and suffixes or reading English texts that contain many words with prefixes and suffixes.

Conclusion (5 - 7 minutes)

1. Lesson Summary (2 - 3 minutes):

   • Content Recap: The teacher revisits the key points covered in the lesson, reinforcing the concept of prefixes and suffixes, their definition, and how they modify the meanings of words. He recalls the importance of being able to divide words into prefix, root, and suffix, and how this helps understand the meaning of words.
   • Review of Practical Activities: The teacher recalls the practical activities carried out, highlighting the 'Create a New Word' game, the reading comprehension exercises, and the word puzzle. He emphasizes how these activities allowed students to apply theoretical knowledge in a practical and playful way.

2. Theory-Practice Connection (1 - 2 minutes):

   • Importance of Practice: The teacher explains that while theory is fundamental, practice is essential to consolidate learning. He highlights how the practical activities helped students better understand the use of prefixes and suffixes in word formation and in understanding English texts.
   • Learning Reinforcement: The teacher reminds students that the ability to recognize and use prefixes and suffixes is a valuable tool that they can apply not only in the classroom but also in their English readings, writing texts, and oral communication.

3. Additional Materials (1 - 2 minutes):

   • Reading Suggestions: The teacher suggests that students continue exploring the topic at home by reading English texts containing many words with prefixes and suffixes. He may recommend books, magazines, websites, and blogs that offer a variety of texts suitable for students' proficiency levels.
   • Online Materials: The teacher may also indicate online resources that offer interactive activities, games, quizzes, and videos on the use of prefixes and suffixes in English.

4. Subject Importance (1 minute):

   • Subject Relevance: Finally, the teacher emphasizes the importance of knowing prefixes and suffixes for English fluency. He highlights that by mastering this aspect of the language, students will be able to understand and use a wide range of words more easily, enriching their communication and understanding in English.