one   two three  ,sit sit sit.

you can say: one two three, three two one.
             or   One two three, i am a tree.

one two three
It's a tree.
four five six
Pick up sticks.
seven eight
we are late.
nine ten
begin again.

one two three, sit  straight

one two three  sit sit straight

一，二年级可以用one,two three,  three,two,one。对他们来说比较简单。
三年级之后就可以用one,teo,three,   up straight 。

1  T：One, two, three.
    Ss: Sit, sit, sit.
2  T: Eyes, eyes,
   Ss: look, look, look.(手做望远镜的姿势)
   T: Ears， ears,
   Ss: listen, listen, listen.(手放耳边，做倾听状)
   T: Mouth, mouth,
   Ss: close, close, close.(手在嘴边做拉拉链的姿势，声音越来越轻，节奏越来越慢。)

ABC    sit well      three two one