A tip that helps me in practice with children who do not "sit". Maybe it will help some of you as well. 

When we tell the child, "Hold on a second." the child understands it this way: "Sit down, even if you want to do something else now, we will fight here until one of us explodes." 

It is the mentioned "moment" that the child needs to express visually in some way. What has worked for me in practice: 

1) Express the structure of the whole lesson with the help of pictures. Then take pictures individually after completed tasks. 

2) Use the track and the train to visualize the progress and move the train according to the level of cooperation. When the child is working, move the train forward. If not, he can back up. We regulate the "moment" according to the mood, energy, interest of the child. The biggest benefit is that the child now sees "for a while" and understands how long it will probably take. 

Instead of a train, I sometimes use pyramids, for example a wooden tree, see photo. For the completed partial task, we will add one floor. When the tree is whole, we move on to the next task. 

At the end of the whole lesson, a small reward should be promised.