Within ACL 3 High, linear information firmly captures the person's attention and guides the person's actions. The person is interested in shapes and containers that have pieces to: put into, take out of, or fill up. While their actions are slow, their attention span may last from 60 seconds to 30 minutes. Keeping them busy, constructively, is a challenge.
The concept of a straight line is bent to form a shape. First, the shape has an outside edge, perimeter or an outline. Then the shape has an inside space or contents. Brightly coloured objects are included and they can be matched and sorted by colour and shape. The bold clear lines help them to organise their actions and give them something to aim for. The actions are not grouped together to fulfil a purpose.