Lesson: 10.6 Cell Organelles: Mitochondria, Chloroplasts, and Ribosomes

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Lesson Objective

Explain the function of the mitochondria, chloroplast, and ribosomes.

Lesson Plan

8th Grade Life Science Ryland

Wednesday October 6, 2010

10.6 Mitochondria, Chloropalsts, and Ribosomes





-         Explain the function of the mitochondria, chloroplast, and ribosome in cellular functions.   


Do Now

-         Cell Organelle Vocabulary Quiz Retake



  1. Vocab quiz retake (10)
  2. Review: Nucleus and Cytoplasm (5)
  3. Cell diagram (5)
  4. Notes and Videos: Mitochondria, Chloroplasts, and Ribosomes (20)
  5. You tube videos for each (10)
  6. Wrap-up/Homework (10)



-         Book Reading Pages 19, 22-24

-         Section Review Questions    


Lesson Sequence/Notes:

  1. Do Now (10)

·        Each Wednesday students that failed to demonstrate master the weekly vocabulary on Tuesday have a second chance. This comes in the form of the vocabulary quiz retake.

·        Students come into the classroom find their seat, take out their binders, write down their aims for the day, and write vocabulary quiz retake for the do now.

·        If they do not have to retake the quiz (received an 80% or higher on Tuesday) they take out their silent sustained reading book and read during this time.

·        If a student has to retake the quiz they complete their do now sheet, clear their desk, and I hand them out.

·        In the first quarter the retake takes the form of a multiple choice quiz and if the score is higher than the Tuesday quiz it replaces this grade in the grade book. (In future quarters the retake format changes and the grade gets averaged with the first quiz grade in order to give students increasing incentive to master the vocabulary the first time around.


  1. Review Nucleus and Cytoplasm/Videos (5)

·        The class runs through the structures and functions of the nucleus, nuclear membrane, and cytoplasm.

·        After we review the structures and functions we watch a quick you tube video on the function of these three structures. (link)


  1. Labeling Cell Diagram (5) (given out during the 10.5 lesson)

·        Students are broken up into their table groups and given time to label the nucleus, nucleolus (mentioned in the nucleus notes), nuclear membrane, and cytoplasm on both the animal cell and plant cell diagram.


  1. Notes/Videos: Mitochondria, Chloroplasts, and Ribosomes

·         The class fills in the Mitochondia guided notes. (file)

·         We then watch the You Tube video on the mitochondria: it is a short video but it does show the structure of the mitochondria. Before the video I do mention that the details about making energy are a little more complex than we will study but it does show how the layers of the mitochondria are needed to complete its function. (link)

·         The class fills out the chloroplast guided notes. (file)

·         We then watch the chloroplast video from YouTube (link). This is a slightly silly video, however it has a good comparison of a chloroplast to a restaurant. After the video, to make sure that students understand the comparison and the purpose of the video questions can be asked about the video, such as asking a student to explain why it makes sense that they portrayed the chloroplast as a restaurant and why you can call ahead for different areas of seating (the different membranes on the chloroplast) 

·         Finally, the class fills out the lysosome notes. (file)


  1. Wrap-up/Homework (5)

·        At the of class we preview the homework (book work)

·        We also orally review the material for the day. We again go through the two types of cells and what is different between them, we then move onto the structure and functions of the mitochondria, chloroplasts, and ribosomes. Finally we review what types of cells (both prokaryotic and eukaryotic and then plant and animal) these organelles are found in.



Materials Needed:

-         Vocabulary quiz retake

-         Animal and Plant Cell Diagram (from 10.5 lesson)

-         Notes sheets: Mitochondria, Chloroplast, and Ribosome

-         YouTube Videos: Nucleus, Nuclear Membrane, ad Cytoplasm and Mitochondria

-         Homework (Cells and Heredity) (These will be uploaded as soon as I can locate a scanner.)


Lesson Reflection:

·        Pluses about the lesson:

·        The daily review of the organelles is great because it keeps each of them fresh in their minds. If oral reviews don’t work for you classroom then all of these reviews can be done on a ½ sheet of paper.

·        Because of the Monday vocabulary day format to the week, the notes on each organelle are easy to put together and draw on student’s prior knowledge because they already have a basic definition of what each of the organelles does with in the cells. These notes serve to reinforce these key points, add a layer of details, get them thinking about what cells they belong in, and how they work as a part of the system of the cell as a whole.

·        Deltas for the lesson:

o       I like how the mitochondria video shows that the different layers are necessary for completing the function of creating energy, however I would like to find a simpler video that doesn’t have to be introduced with the caveat of “don’t worry about all of the details”

o       I have yet to find any great video clips for the chloroplasts or ribosomes, I would like to find those so that students can get a visual of these organelles and especially get an appreciation for how small ribosomes are compared to other organelles, and to see how they can float in the cytoplasm or be attached to the endoplasmic reticulum.


Lesson Resources

10 6 Mitochondria Guided Notes   Notes
10 6 Chloroplast Guided Notes   Notes
10 6 Cell Organelle Vocabulary Retake Quiz   Assessment
10 6 Book Questions   Homework
10 6 Ribosome Guided Notes   Notes
Cells and Heredity Book Reading Pages 19 22 24   Reading Passage


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