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Math lesson plan · 8th grade (Year 9 in England) · 60 minutes

Write numbers in scientific notation (standard form)

Number sense

CCSS 8.EE.A.3CCSS 8.EE.A.4England: KS3 NumberEngland: GCSE Foundation Number

Objective and success criteria

Students will: Write numbers in scientific notation (standard form).

  • I can answer questions on today's skill on my own, without help.
  • I can explain each step and say why it works.
  • I can check my answer and spot a mistake.

Before and after

Needs first: Write scientific notation as an ordinary number

Leads to: Compare and order numbers in scientific notation; Multiply and divide in scientific notation

Materials: Place value chart, Base-ten blocks or a number line, Mini whiteboards and pens, Printed student sheet (below).

Warm-up · 6 min

  • Quick retrieval from earlier learning (Write scientific notation as an ordinary number). Students answer on mini whiteboards.
  • Show answers together and note who needs support in the main task.
  1. Write 8 × 10³ as an ordinary number. → 8000Prompt: 10 to the power 3 moves the digits 3 places to the left.
  2. Write 4.7 × 10⁻⁴ as a decimal. → 0.00047Prompt: A negative power of 10 makes the number small.
  3. The population of the world is about 8.1 × 10⁹ people. Write this number in full. → 8100000000Prompt: Multiply by 10 9 times.

Hook · 6 min

  • Show a number in the news or a price tag and ask what each digit is worth.
  • Share the objective: Write numbers in scientific notation (standard form). Read the success criteria together.

I do: model it · 12 min

  • Work through the example out loud, saying why you do each step, not just what you do.
  • Example: Write 16 000 in scientific notation (like 4.5 × 10^6).
  • Step 1: Move the point 4 places: 1.6 × 10⁴
  • Answer: 1.6 × 10⁴
  • Pause after each step and ask a student to say what comes next.

We do: guided practice · 12 min

  • Do these together. Students try each step on whiteboards before you reveal it.
  • Use the hints as prompts rather than giving the answer.
  1. Write 730 000 in scientific notation (like 4.5 × 10^6). → 7.3 × 10⁵Prompt: The first number must be at least 1 and less than 10.
  2. Write 0.0000014 in scientific notation. → 1.4 × 10⁻⁶Prompt: Move the decimal point to just after the first non-zero digit.

You do: independent practice · 17 min

  • Students work on the student sheet. Circulate and check the first two answers of every student early.
  • Students who finish: write a question of their own for a partner, with the answer.

The 8 questions are on the student sheet below, with answers in the key.

Exit ticket · 7 min

  • Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.
  1. Write 610 000 in scientific notation (like 4.5 × 10^6). → 6.1 × 10⁵Prompt: The first number must be at least 1 and less than 10.
  2. Mei writes 420 000 as 42 × 10⁴. Why is that not scientific notation? (42 is not between 1 and 10 / You cannot use decimals / The value is wrong / The power of 10 must be negative) → 42 is not between 1 and 10Prompt: Is the value correct? Check by multiplying out.

Watch out for

  • Reading 1,045 as one thousand four hundred five: point to each place and say its value.
  • Thinking a longer number is always bigger, even with decimals (0.45 vs 0.5).

Support and stretch

Support

  • Review first: Write scientific notation as an ordinary number.
  • Use concrete materials: place value chart.
  • Give the first step of each question, or a partly worked example to finish.
  • Pair with a confident partner for the guided practice.

Stretch

  • Move on to: Compare and order numbers in scientific notation; Multiply and divide in scientific notation.
  • Explain a common mistake in writing and how to fix it.
  • Write a word problem that uses today's skill, then solve a partner's.

Homework and more practice

Free online practice with hints and printable worksheets for this skill: eurekami.com/math/grade-8.

Free lesson plan from eurekami.com/lesson-plan-builder

eurekami

Write numbers in scientific notation (standard form)

Name

Date

Score/ 8

  1. Question 1

    Write 9 600 000 000 in scientific notation (like 4.5 × 10^6).

    Answer

  2. Question 2

    Sofia writes 6300 as 63 × 10². Why is that not scientific notation?

    • A. 63 is not between 1 and 10
    • B. The power of 10 must be negative
    • C. You cannot use decimals
    • D. The value is wrong

  3. Question 3

    Write 0.043 in scientific notation.

    Answer

  4. Question 4

    Write 4 000 000 000 in scientific notation (like 4.5 × 10^6).

    Answer

  5. Question 5

    Noah writes 77 000 as 77 × 10³. Why is that not scientific notation?

    • A. 77 is not between 1 and 10
    • B. The value is wrong
    • C. The power of 10 must be negative
    • D. You cannot use decimals

  6. Question 6

    Write 0.00028 in scientific notation.

    Answer

  7. Question 7

    Write 9 100 000 in scientific notation (like 4.5 × 10^6).

    Answer

  8. Question 8

    Kai writes 76 000 as 76 × 10³. Why is that not scientific notation?

    • A. 76 is not between 1 and 10
    • B. The value is wrong
    • C. The power of 10 must be negative
    • D. You cannot use decimals

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Answer key: Write numbers in scientific notation (standard form)

  1. 1. 9.6 × 10⁹

  2. 2. A. 63 is not between 1 and 10

  3. 3. 4.3 × 10⁻²

  4. 4. 4 × 10⁹

  5. 5. A. 77 is not between 1 and 10

  6. 6. 2.8 × 10⁻⁴

  7. 7. 9.1 × 10⁶

  8. 8. A. 76 is not between 1 and 10