### Teaching and Group Activities for Understanding

**Day 1 Teaching**

Show children a 1–100 number track. Cover some numbers with sticky notes. Identify which numbers are hidden by counting. Use the 1–100 bead bar to demonstrate that 72 is bigger than 27 because it has 7 tens. Discuss how the first digit in a 2-digit number tells us the number of tens. Repeat with other numbers. Using base-10 equipment, such as Numicon shapes or Dienes blocks alongside, will help to secure the concept.**Group Activities**-- Create a 2-digit number and compare, saying which is less/more.

-- Order items from a class shop and locate these prices on a beaded line.

**Day 2 Teaching**

Write 27 on a tag. Children identify where this goes on the bead bar. Is it nearer to 30 or to 20? Ask a child to hang the tag in the correct place. Think of another number that goes between 20 and 30 and write it on your whiteboard. Take feedback. Repeat with other numbers.

**Group Activities**

-- Find numbers between two neighbouring multiples of 10 and label these on a beaded line.

-- Create 2-digit numbers and order them from smallest to largest.

**Day 3 Teaching**

Show children digit cards 5 and 3 and make the numbers 53 and 35. Use arrow cards to show 50 and 3 in 53 and 30 and 5 in 35. Write 5 and 3 in a place value grid, and then repeat for 3 and 5. Which number is bigger, 35 or 53? Repeat with other pairs of digit cards.**Group Activities**

Use the ‘Calculator Capers’ in-depth problem-solving investigation below as today’s group activity.

Or, use this activity:

-- Investigate how many 2-digit numbers can be made using three 1–9 digit cards.