I was modelling a math lesson the other day and the teacher who was observing took notes of everything I said. She typed it up and sent it back to me. I found it fascinating to see my own words reflected back to me. Great reflection. I highly recommend it.

- I want you to show me eight circles (also demonstrate self)
- Vocalised how each person did it… rows, lines, groups
- If you were going to erase two, which two would you erase? Don't do it yet… just show me which ones you will erase.
- Ok now Erase.
- What made you do it that way? What made you choose those circles to erase?
- Was their an easier way to do that?
- Can you now draw ‘12’ crosses for me.
- Mine is organised like… how did you organise yours?
- Can you organise yours a bit more easily?
- How can you arrange 12 crosses differently?
- How many do we have here? 12. I'd like you to write 12 here.
- All students write the number 12.
- Then I'm going to write this little sign here -. 12 -.
- What does this sign mean?
- Now tell me how you're going to erase 5. Which 5 will you take away? Tell me first.
- Now do it. Now how many are left?
- Write on your own board 12-5=7
- What does this sign mean? “=”
- Talk and discuss the shape of the crosses that are left… oh, Jesse, I see you have 3 in 2 rows. Haru, you have 2 in 5 rows etc
- Now we are going to do something a little harder…
- Please draw 13 triangles. Keep it organised, so it's easy to see the number of triangles.
- Verbalise. What have you got rosa? 4/4/4/1, Jesse 4/5/4, 6/6/1 etc
- Let's write the number 13. Notice a child making it back to front, number, erase and say, oh sorry I erased your work, can you do it again? If repeats, use little dots to show shapes.
- If I ask you to erase 4 of 13, show me which will be the easiest to erase… the easiest way to erase 4.
- Ok erase them now. How many have you got left?
- How do we write that? 13-4=9.
- Before I was asking you to do subtraction on the white board. Now I want you to do that in your head. Can you see 9 circles in your head. Organise them in the easiest way. Can you take away 4 of them? Tell me what you have.
- Ok, now let's use our fingers. Show me 8. Show me how to take away 2. There are 2 ways to take away two. Show me another way.