Crossing the midline is associated with turning objects around while working on them, adjusting the amount of tension or pressure applied and scanning the physical environment.
Turning the Object
Turning the material objects over and around has interesting variations within ACL 4. 6.
Some notecard samples have grids printed on the cards as compensations for spacing difficulties. Leaving the sample face up and their notecard face down tests their ability to think beyond a flat surface, which they can do within ACL 4.2. Within ACL 4.6, they can turn the object to reach the back but the reason is to ease the ache in their back. Within ACL 4.8, the reason is to check for errors in a three-dimensional object.
Scanning
Scanning the physical environment makes such a big difference that writing about it seems to be a bit oxymoronic. Looking around for things they want or need opens the space around them for possibilities, both good and bad. The difference between ACL 4.4 and 4.6 is another big jump in the scale.
Adjusting Pressure, Tension
Neuromuscular adjustments begin with making changes in the amount of pressure they use. If it does not work, try harder. Too much pressure and breakage is common. Adjustments in tension while sewing, knotting, stringing beads and weaving also enters the scale in ACL 4.6.