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Mitosis: How We Grow and Heal
Lesson Plan
Year 2
English
Mitosis: How We Grow and Heal
Key Concepts
1. The Building Blocks of Life
Every living thing, including you, is made up of tiny building blocks called cells. They are so small that you need a microscope to see them! Your skin, your hair, and your muscles are all made of millions of these tiny cells.
2. How Do We Get Bigger?
When you grow taller, it isn't just because your cells are getting bigger; it's because your cells are making copies of themselves. This process is called mitosis (or cell division).
3. One Becomes Two
In mitosis, one single cell does something amazing: it makes a copy of everything inside it and then splits right down the middle to become two identical cells.
4. Healing Our Bodies
Mitosis doesn't just help us grow; it also helps us fix ourselves. If you trip and scrape your knee, your cells start dividing to make new skin cells. These new cells fill in the gap and help your cut heal!
Assessment and Evaluation Plan
Success Criteria
By the end of this lesson, students will be able to:
- State that all living things are made of tiny cells.
- Explain that "mitosis" means one cell splitting into two.
- Identify two reasons why cells divide (to grow and to heal).
Formative Assessment (During the Lesson)
- Think-Pair-Share: Ask students: "If we started as tiny babies and are now much bigger, where did all the extra 'stuff' in our bodies come from?" Observe their discussions to check for the understanding that our bodies make more cells.
- Mini-Whiteboard Check: Ask students to draw a simple diagram of one cell becoming two. Walk around to see if they understand the "split" concept.
- Vocabulary Check: Use thumbs up/thumbs down to check if students understand that "mitosis" is just a fancy word for "making a copy and splitting."
Summative Assessment (End of Lesson)
- The 'Cell Story' Drawing: Students will draw a three-part cartoon strip:
- A single cell getting ready.
- The cell splitting in the middle.
- Two brand-new cells side-by-side.
- Exit Ticket: Students must answer one question before leaving: "Name one time your body uses mitosis to help you." (Expected answers: growing taller, fixing a cut, growing hair).