Investigative 2 Day Lesson
Title of Lesson: Investigation of Sexual Reproduction
UFTeach Students’ Names: Michael Hartman
Teaching Date and Time: April 7-8, 2014
Length of Lesson: 100 minutes
Course / Grade / Topic: Advanced Life Science / 7 / Reproductive System
Source of the Lesson:
Alachua County Pre-Test
Flower Dissection: http://www.scientificjam.com/SCIENCE404WEB/science404web_unit7/7thwebfiles/LAB_FlowerDissect.pdf
Embedding Strategies Based on Observations and CTS:
Based on the CTS and what happened in class, I am including the following teaching strategies with these students because…
Title of Lesson: Investigation of Sexual Reproduction
UFTeach Students’ Names: Michael Hartman
Teaching Date and Time: April 7-8, 2014
Length of Lesson: 100 minutes
Course / Grade / Topic: Advanced Life Science / 7 / Reproductive System
Source of the Lesson:
Alachua County Pre-Test
Flower Dissection: http://www.scientificjam.com/SCIENCE404WEB/science404web_unit7/7thwebfiles/LAB_FlowerDissect.pdf
Embedding Strategies Based on Observations and CTS:
Based on the CTS and what happened in class, I am including the following teaching strategies with these students because…
Concept Development:
Human reproduction and development is an important part of middle school life science curriculum. Students are going through puberty at this time, and will be curious about how their body is changing, and how it all “works”. Important reproductive structures include: egg, ovary, fallopian tubes, uterus, cervix, vagina, urethra, penis, scrotum, testis, sperm. Human gametes are the egg and sperm cells which combine to form a 2n cell through fertilization, also called “conception”. The sperm has a head, which burrows into the egg, and a tail, which moves it up the vagina, through the uterus, and into the fallopian tube where it may encounter an egg to fertilize. The fertilized egg then implants on the uterine wall, and over 9 months develops into a human baby. This development can be interrupted or harmed by maternal environmental factors or substances that the mother intakes during the 9 month pregnancy. These factors can include a lack of vitamins and nutrients, excess alcohol or other illicit drugs, lead or mercury poisoning. In a healthy pregnancy, a zygote develops into an embryo, which then develops into a fetus, which is then birthed when fully developed. The fetus is given nutrients via the umbilical cord, which connects to the placenta. Human development does not stop after birth, as many major mental and physical changes occur even over a decade after birth. The period where a human becomes sexually “mature”, or, able to reproduce is called “puberty”. Secondary sex characteristics (body hair, voice lowering, breast growth, etc.) develop during this time; females undergo puberty a few years before males.
Sources:
McGraw Hill Florida Life iScience Textbook
Benchmarks for Science Literacy - http://www.project2061.org/publications/bsl/online/index.php
National Science Education Standards - http://www.nap.edu/openbook.php?record_id=4962&page=181
Performance Objectives
Materials List
Advance Preparations
Safety
No significant concerns for day one; but for the flower dissection on day two sharp tools are necessary. Students have used these in the past and should be familiar with the technique, but a preliminary demonstration would be useful to make sure the principal investigators are safe. Circulation to each group to watch for safety with these tools is important.
5E Lesson
Day 1
Human reproduction and development is an important part of middle school life science curriculum. Students are going through puberty at this time, and will be curious about how their body is changing, and how it all “works”. Important reproductive structures include: egg, ovary, fallopian tubes, uterus, cervix, vagina, urethra, penis, scrotum, testis, sperm. Human gametes are the egg and sperm cells which combine to form a 2n cell through fertilization, also called “conception”. The sperm has a head, which burrows into the egg, and a tail, which moves it up the vagina, through the uterus, and into the fallopian tube where it may encounter an egg to fertilize. The fertilized egg then implants on the uterine wall, and over 9 months develops into a human baby. This development can be interrupted or harmed by maternal environmental factors or substances that the mother intakes during the 9 month pregnancy. These factors can include a lack of vitamins and nutrients, excess alcohol or other illicit drugs, lead or mercury poisoning. In a healthy pregnancy, a zygote develops into an embryo, which then develops into a fetus, which is then birthed when fully developed. The fetus is given nutrients via the umbilical cord, which connects to the placenta. Human development does not stop after birth, as many major mental and physical changes occur even over a decade after birth. The period where a human becomes sexually “mature”, or, able to reproduce is called “puberty”. Secondary sex characteristics (body hair, voice lowering, breast growth, etc.) develop during this time; females undergo puberty a few years before males.
Sources:
McGraw Hill Florida Life iScience Textbook
Benchmarks for Science Literacy - http://www.project2061.org/publications/bsl/online/index.php
National Science Education Standards - http://www.nap.edu/openbook.php?record_id=4962&page=181
Performance Objectives
- Define processes, structures, and other terms involved in sexual reproduction
- Identify and diagram the reproductive structures of a flower
Materials List
- Pre-Test (1 per student)
- White board, marker, eraser (1 set per group)
- Flower for dissection (1 per group)
- Sharp cutting tool (1 per group)
- Dissecting microscope (1 per group)
- Dissecting dish (1 per group)
- Tweezers (1 per group)
- Metal probe (1 per group)
Advance Preparations
- On both days, the powerpoint presentation should be set up before students enter the classroom
- On the first day whiteboards and accessories should be passed out to the groups before they enter the class. Groups can be 3-5 students, and the students already know who all is in their group.
- On the second day (flower dissection) all lab stations should be labeled, and all materials should be laid out at each lab station to cut down on non-learning time. Students also know what
- Pre-test (day 1) and lab worksheets (day 2) should be altered if necessary and printed out ahead of time
Safety
No significant concerns for day one; but for the flower dissection on day two sharp tools are necessary. Students have used these in the past and should be familiar with the technique, but a preliminary demonstration would be useful to make sure the principal investigators are safe. Circulation to each group to watch for safety with these tools is important.
5E Lesson
Day 1
Day 2