WALT: Recognise the 'th' sound

12345678
Across
  1. 3. It is polite to say - - - - - you!
  2. 4. We use this to wipe the table.
  3. 5. Sometimes we walk along this.
  4. 8. How deep something is.
Down
  1. 1. A subject with a lot of sums.
  2. 2. A similar creature to a butterfly.
  3. 6. Another word for they.
  4. 7. A loud noise