1997 WWLPT Biology Institute:  Life Cycles:  Reproduction & Embryological Development


Lesson Title: A Multicultural Approach to teaching a Science Lesson.
     Modeling African American Scientist Ernest Just's Experiment on Parthenogenesis

 
    
Carol Moravec
Lincoln Southeast High School
2930 South 37th Street
Lincoln, Ne 68506
Stephanie Ramirez 
St. Joseph's Academy 
2307 S. Lindbergh 
St. Louis, MO  63131
Jaime L. Zung 
Rye High School 
Parsons Street 
Rye, NY 10580
 

 



Summary/Abstract
Instructor's Objectives
Target Age or Ability Group Audience
Teacher Instructions/Special Precautions
Materials & Equipment Needs
Background [Prior Knowledge or vocabulary necessary to complete activity]
The Student Lab
Method of Evaluation/Assessment
Extension/Reinforcement/Additional Ideas
References
Carol  Moravec
Summary/Abstract to top
      Teaching students from a multicultural prospective creates a learning environment which is most conducive to the success of all students. With the above statement in mind we have created a science lesson.  Before you begin this lesson it is advisable to read  our brief summary on what is multicultural science education and  why it is important that we teach it.  You may also check the extension for assistance on how to ensure that you are teaching science where all students can reach their fullest potentials. The student's lab sheet consists of a brief biography of Ernest Just in the form of a talk show and an activity where the students will then perform an experiment modeled after Ernest Just's work.  We also included a long list of resources that teachers can access for assistance in teaching multicultural science. This lesson can be adapted to represent any ethnic group.
 
 to top What is multicultural science education?
     Multicultural science education is an attempt to provide  equal educational opportunities for all students to learn and enjoy science. Students are taught to appreciate all contributions made by minorities and women in the fields of science and technology, medicine, engineering and mathematics.
     Another dimension of multicultural science education is to have the conviction that all students can learn. In order to foster this learning, we have to be cognizant of the fact  that all students learn best when learning is related to their life experiences within their culture.
     "Multicultural education emphasizes inclusion. This is, the contributions of all Americans are recognized and valued. Students will increase the knowledge and appreciation of their race and cultural  heritage as well as others" (Bryant Jr. 1997).

Why Should We Teach  Multicultural Science  Education?
     Traditional curriculum does not serve minority students well. "Education that legitimize the cultural norms of only one culture within a pluralistic society robs students from other cultural backgrounds of self-esteem and contributes to discrimination" (Mary M. Atwater1993).
     The implementation of multicultural education has the possibility to create viable links between individuals of all races, creeds, and ethnicities.  It also provides instructional process with the unification of the school, community, teachers, and parents with a consciously selected curricula, incorporating the students' cultural backgrounds.
     Respecting the cultural background and dignity of each student will be an asset to our society.  The focus of multicultural education is on critical thinking as well as on how to learn, acknowledging that different students have different learning styles.  It facilitates communication between students, teachers, and society.
     Multicultural education will help to eliminate stereotypes, prejudice, racism, and bigotry.  Minority students gain a sense of pride, self-worth, appreciation of one's culture seen in context with other cultures.  " The mind of any child is too precious a commodity to waste" (Bryant, Jr. 1997).  Cultural instructions in school will enable students to appreciate and respect cultural diversity with equality.  Students will therefore value understanding each other, working and living together, and sharing power- political, social, economic, and financial.

WHAT IS YOUR MULTICULTURAL COMPETENCE?
 Check this list to see how you rate as a multicultural teacher:
1.  What stereotypes do you have towards students of different ethnic backgrounds?
2.  Do you provide positive role models for students from different cultural backgrounds?
3.  Do you use a variety of teaching methods?
4.  Do you teach from a multicultural prospective?
5.  Is your classroom climate a deterrent for students of all cultures to reach their fullest potentials?
6.  From whose prospective is the science text written?
7.  Describe your efforts to supplement the standard curricula with culturally diverse information,      activities, and materials.
8. Do you think multicultural education is only for heterogeneous classrooms?
                How did you rate yourself?

 

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        This multicultural lesson focuses on Dr. Ernest Everett Just (1883-1941), an African-
American marine embryologist.  Writer Kenneth Manning considers him the "Black Apollo of Science", making strides in his field amidst racial prejudice in the United States through  the 1920's and 1930's.   Dr. Just induced parthenogenesis in Nereis worm eggs by increasing the temperature of the sea water.  Students will model this experiment  in the classroom.



Instructor's Objectives to top
    By the end of this lesson on Ernest Just the student will
        a) learn the scientific contribution that Ernest Just has made in American history.
        b) perform an experiment modeled after Dr. Just's work.
        c) explain how parthenogenesis can be induced in Nereis eggs.
        d) propose an experiment modeling Dr. Just's work.

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Target Audience or Age Group  to top  to top

Notes to the Teacher: to top

    Required of students:  A basic background of what occurs in the early stages of                development of marine annelids.

    Preparation time needed:  Order Nereis worms ahead of time and use them the next day after shipment.   You can also use sea urchin embryology kit from Wards or Carolina or collect clam worms or purchase them in a bait store( if available in your area). You will need at least one hour to:
            1) prepare Instant Ocean--available at pet stores (if you do not live in a
                marine environment.-collect prior to lab).
            2) heat sea water or Instant Ocean to 30-33oC.
            3) organize equipment on tables for easy student access.
     
    Class time needed:  40-45 minute class (If you are on a block schedule, you could have students design  their own experiment and complete it in class)

    [Hazards/Precautions]:  Keep Nereis worms in sea water covered.

    *Dr. Just collected Nereis limbata, which are sexually dimorphic.  The females are yellow or green, and the males are red and white.  During the summer nights(when there was a full moon)  he collected both males and females at the surface of the water.  As the males released their milky sperm, the female's eggs would sink to the bottom.  He performed both breeding and parthenogenesis experiments.  Dr. Just discovered you could induce parthenogenesis by placing these unfertilized eggs in a warmer temperature of 30-33oC.
    For more of his experiments consult his book, Basic Methods for Experiments on
    Eggs of Marine Animals

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Materials & Equipment Needs to top
*Nereis species--ordered through Marine Biological Laboratory in Woodshole,Massachusetts.
    If not available, you can use clamworms(if available in your area) or order sea urchins
    from Carolina Biological Supply or Wards.
*Sea water or Instant Ocean (Instant Ocean is available at a pet store)
*Large test tubes
*small glass bowls
*watch/clock
*pipettes
*hot plate/hot water bath
*thermometers
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Background to top
[Prior Knowledge or Vocabulary Necessary to Complete Activity]
        The student should have knowledge of these terms:
            *fertilization--union of sperm and egg to produce a zygote
            *cleavage--division of the fertilized egg without an increase in size
            *parthenogenesis--a specialization of sexual reproduction, in which an egg undergoes
                                            development without fertilization.
            *trochophore --early larval stage of marine annelids
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The Student Lab to top
  Student lab sheet
  1. Introduction
  2. Purpose
  3. Equipment
  4. Procedure
  5. Observation
  6. Conclusions
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Methods of Evaluation/Assessment to top
1.  The students' response to the conclusion questions.
2.  Individual or group assignments where student(s) research a minority scientist and
     create their own dialogue or design their own experiment.
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Extension/Reinforcement/Additional Ideas to top
 
    Below is a typology for multicultural science.  This typology is from Dr. Prentice Baptiste's book, Transforming the Curriculum for Multicultural Understandings (1996).  Teachers can use this typology as a model to evaluate their curriculum.  For examples of teaching ideas at each level, see Science Teacher, February 1996.
                   Typology for Multiculturalizing Science Instruction
T Level 3 Process/Philosophical Orientation 
Teachers are committed to multicultural 
science education. They are active in the process of designing and developing science lessons and activities that are free from stereotypes and racism.The instruction becomes inclusive instead of exclusive. 
 
 
 
 
 
 

Level 2 Process/product 
Infusion into science multicultural perspectives and contribution to a science concept development/or evolvement. Non -traditional scientist and women contributions are tied into the curriculum. Science instruction is commensurate with diverse learning and cognitive styles. Problem solving process and scientific method utilized in elucidating the faultiness of racial and sexual stereotypes, prejudices, 
and ethnocentrism. Contextual array of science content is permeated with diversity. 
 
 
 
 
 
 
 
 
 
 
 

Level 1 Product 
Focus on minority and women scientist's contribution as an additive. May deal with ethnic and cultural contribution in isolation. 
For example, on his/her birthday or during the month designated for celebration of a certain minority group. 
 

 
to top WHERE TO START
     Multicultural science education is a continuous process.  All students can learn regardless of their ethnic or cultural background. Teachers must provide opportunities to maximize the learner's potential. As suggested by S. Waldi Abdi and Lenola Allen in Science Teacher 1997 and 1996 respectively, below are suggestions for incorporating our rich history of science into the classroom.

1. The teacher's mind set plays an important role in implementing and promoting the idea
        that humanity has benefited from diversity.
2. Know the parents and community resources.
3. Treat each family as unique entity with their own cultural identity.
4. Students with language barriers should be given hands-on and minds-on activities which will     enable students to manipulate concrete materials for the development of better skills and attainment of higher levels of science achievement.
5. Assume that all students can learn. Avoid stereotypes that limit students success in selected subjects.
6.  Use exciting and challenging hand-on activities. Teachers must move beyond the textbook.  Provide relevant experiences.
7.  Talk to students about their learning styles. Encourage students to take ownership of their own learning.
8.  Develop a repertoire of content strategies and activities. Include a variety of cognitive/learning modes in your teaching style and assist students in moving from one preferred learning mode to a base of  mixed preferences so they can benefit from information closely related to science.
9.  Help students see themselves as future scientists and appreciate the multicultural history of science. Students must realize that a career in science is an exciting and realistic option for all people.
10.  Build opportunities for success into the curriculum and create a climate conducive to learning.
11. Learn about the history and culture of various groups.
12. Provide diverse learning experiences. Engage students in both in-class and out-of- class learning opportunities.
13. For a test or quiz allow more time for students not yet fluent in English.
14.  All students must be pushed because you value them as human beings.



References Including Web Addresses to top
to top

Abdi, Wali.  1997.  Multicultural Teaching Tips:  Practical suggestions for incorporating the
    diverse history of Science into the Classroom.  Science Teacher 64: 34-37.

Banks, James A.  1997.  Educating Citizens in a Multicultural Society.  Teacher's College
    Press.  New York.

Baptiste, Prentice and Key, Shirley Gholston.  1996.  Cultural Inclusion: Where does your
    program stand.  Science Teacher.  63:  32-35.

Boyer, James and Baptiste, Prentice.  1997.  Transforming the Curriculum for Multicultural
    Understandings:  A Practitioner's Handbook.  Caddo Gap Press.  San Francisco.

Bryant, Napoleon.  1996.  Make the Curriculum Multicultural:  Act Now and Make Science an
    Inclusive Endeavor.  Science Teacher. 63:28-31.

Carey, Shelley J.  1993.  Science for All Cultures.  National Science Teacher's Association.
    Arlington, Virginia.

Gilbert, Scott. F.  ed.  1994.  A Conceptual History of Modern Embryology.  John Hopkins
    University Press.

James, Kessler H. et al.  1996.  Distinguished African American Scientists of the 20th Century.
    Oryx Press.

Just, Ernest Everett.  1939.  Basic Methods For Experiments on Eggs of Marine Animals.
    Blakiston's:  Philadelphia.

Manning, Kenneth R.  1983.  Black Apollo of Science.  The Life of Ernest Just.  Oxford
    University Press:  New York.

Sommerville, Lenola A.  1996.  Capitalizing on Diversity:  Strategies for Customizing your
    Curriculum to meet the needs of all students.  Science Teacher.  63:  20-23.

Additional References

4000 Years Of Women in Science. 

Access Excellence Activities Exchange--series of biology laboratory activities with
     Multicultural Themes.

Desowitz, R.S.  1981.  New Guinea Tapeworms and Jewish Grandmothers: Tales
    of Parasites and People.  W.W. Norton:  New York.

Desowitz, R.S. 1997. Who Gave Pinta to the Santa Maria?  Torrid Diseases in a Temperate
    World.  W.W. Norton:  New York.

Dorough, Donna K.  1996.  Incorporating Multicultural Dialogue:  How to Encourage
    Open Discourse in the Classroom.  Science Teacher.  63: 50-52.

Elaskar, S.  1994.  There is a New World Out There:  Internationalizing the Science
    Curricula.  Eric Document ED382446.

Escalada, Lawrence T.  1997.  Physics for All:  How Universal Technology Can Spark
    Universal Success in the Physics Classroom.  Science Teacher 64: 26-29.

The Faces of Science.  African Americans in the Sciences.
 
Keating Joseph F.  1997.  Harvesting Cultural Knowledge:  Using ethnobotany to reap
    the benefits of ethnic diversity in the classroom.  Science Teacher.  64: 22-25.

Intercultural E-Mail Classroom Connections.  Free service to help teachers & classes
    link with partners in other countries.

Mekar, Claudia.  1995.  Multiculturalism in Science Education.  American Biology
    Teacher.  57: 21-26.

Multicultural Pavilion.  Resource for educators interested in multicultural issues.
 
Murfin, Brian.  1996.  An African Chemistry Connection:  Simulating Early Iron
    Smelting.  Science Teacher. 63:  36-39.

Selin, Helaine.  1994.  Science Across Cultures.  Science Teacher 60: 32-36.
    38-44.
 
 
 
 
 

 
Moravec