Measures visual-spatial organization. Child works puzzles. Seems to affect mostly representational math like geometry . These children need to memorize the formulas. Same as Block Design.
Child does parquetry, fitting colored blocks together to match a picture.
Measures fine-motor speed. Child has to copy designs from a legend into the corresponding number. These kids are slow to finish written work. They need extra time, and if it's very serious, in the upper grades it is helpful for them to learn to use some abbreviations, and keep several words in their heads when copying. They often become better typers than writers, and for the very severe they often learn shorthand in 2-3 weeks, and then they can write a s fast as the teacher can talk.