Write a very simple grade three (3) Mathematics lesson plan in very simple English words.

Here is a simple Grade 3 Mathematics lesson plan on subtraction with borrowing:

Lesson Plan: Subtracting Two-Digit Numbers (with Borrowing)

• Topic: Subtraction with Borrowing
• Grade Level: Grade 3
• Time: 45 minutes

1. Lesson Objectives:

• Students will learn to subtract two-digit numbers using a vertical method.
• Students will understand how to "borrow" from the tens place when they cannot subtract in the ones place.
• Students will use counting blocks to help them subtract.

2. What Students Already Know:

• How to subtract small numbers (e.g., $8 - 3$).
• How to subtract two-digit numbers without borrowing (e.g., $35 - 12$).
• Numbers up to 100.

3. Materials Needed:

• Counting blocks (like tens and ones blocks)
• Whiteboard or blackboard
• Markers or chalk
• Worksheet with subtraction problems

4. Lesson Steps:

• Step 1: Review Easy Subtraction (5 minutes)

  • Start with a few simple subtraction problems that do not need borrowing.
  • Example: $48 - 23$
  • Ask students to solve them using the vertical method.

• Step 2: Introduce a Harder Problem (15 minutes)

  • Write a problem like $45 - 27$ on the board.
  • Ask: "Can we take 7 from 5 in the ones place?" (Answer: No).
  • Explain "borrowing":
    • "We need more ones. Let's take 1 ten from the 4 tens. The 4 tens become 3 tens."
    • "We give that 1 ten to the 5 ones. 1 ten is 10 ones. So, 5 ones become 15 ones."
  • Show this with counting blocks: Start with 4 tens and 5 ones. Take one ten block, exchange it for ten one blocks. Now you have 3 tens and 15 ones.
  • Now subtract:
    • Ones place: $15 - 7 = 8$. Write 8.
    • Tens place: $3 - 2 = 1$. Write 1.
  • The answer is $\boxed{\text{18}}$.

• Step 3: Practice Together (15 minutes)

  • Do another problem together, like $63 - 28$
  • Guide students to follow the borrowing steps.
  • Use blocks again to show the process.

• Step 4: Independent Practice (10 minutes)

  • Give students a few problems to solve on their own or with a partner.
  • Walk around and help students who need it.

5. Assessment:

• Check if students can solve subtraction problems that need borrowing.
• Ask them to explain how they "borrowed" a ten.

6. Homework:

• Give students a worksheet with 5-10 subtraction problems that require borrowing to practice at home.