Mrs. Wexler

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12/6 We are beginning our study of the parts of a flower.

Sepal – green, leaf-like part; surrounds the bottom of the flower and 
protects the ovary

Pollen – yellow, sticky powder; grains of pollen fertilize (make) the seeds.

Petal – part of flower that attracts insects with color or odor.

Pistil – female part of the flower

Stigma – female part that receives the pollen

Style – tube where pollen travels to the ovary

Ovary – pouch where seeds are made

Stamen – male part of the flower

Anther – small sac on top of filament; it makes pollen

Filament – skinny tube; holds up the anther

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Our third grade class will be using an exciting science program called 
Science 21, which is activity-based and NOT textbook-based. Research has 
shown that true science

learning does not come from memorizing facts from a 
science textbook. Rather, good science is learned through active 
participation, engaging students in inquiry-based, hands-on experiences. 
Through Science 21 your child will be actively engaged in science 
activities, 
learning how scientists as questions and design experiments to find the 
answers. Like scientists, your child will be working cooperatively recording 
results, and sharing them with the rest of the class.

Cycles In the Natural World

The Grade 3 curriculum is the Science 21 Program developed at the 
Putnam/Northern Westchester 
BOCES. The Program was put together by area elementary teachers to provide 
direction and vision 
of elementary science education for local school districts. The program’s 
main focus is a hands-
on, inquiry-based science, and that math, language arts and technology are 
integrated at points 
where they fit naturally.

Content and Core Lesson is divided into four units:

Unit 1: How a Scientist Investigates Plant Cycles

• What a scientist does
• How a scientist (student) keeps an account of their work
• Investigate how a seed becomes a plant
• Parts and functions of a plant

Unit 2: How a Scientist Investigates Electricity

• Introduction to electricity
• How switches control the flow of electricity
• Conductors and non-conductors
• Series and parallel circuits
• Creating a circuit board

Unit 3: How a Scientist Investigates Water Cycles

• Sources and types of water
• States of water
• Water cycle
• Weather and the water cycle
• Conservation of water

Unit 4: How a Scientist Investigates Animal Cycles
• Study and observe the butterfly

For additional information on the Science 21 Program, please go to the 
following website:
http://www.pnwboces.org/cesar/sci21

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