Germs Make Me Sick by Melvin Berger
Number and Operation
Patterns, doubling sequence of the power of two
Lesson Created by:
Karen Franz, Woodrow Wilson Elementary, Manhattan, KS
- calculator, Germs Make Me Sick by Melvin Berger or "Reading Rainbow" video: Germs Make Me Sick
1. Launching the Lesson
- Read the story or watch the video
- Talk about how long it takes for bacteria to multiply (20 minutes for some fast growing ones).
2. Developing the Lesson
- Pose the question: If you would have only one bad bacteria enter your body, how long do you think it would take for it to multiply into 1 million bacteria? Have students estimate the time.
- Demonstrate the doubling sequence of the power of 2, both with pencil and paper, and with a calculator.
- Have students work in pairs, first doubling each number with pencil and paper, and checking it with a calculator.
- Record the data, using a T chart.
- After students understand the concept of doubling, introduce a new problem, using a different unit of measurement.
Sample: Paul Bunyan found a one foot snake that would triple its
length every hour. How long would the snake be after one day?
- Can you convert the feet to miles?
- Encourage students to make their own questions.