The following list is comprised of books, websites and research papers you can use.
Books & Websites
Visual/Spatial Portals to Thinking, Feeling and Movement: Advancing Competencies and Emotional Development in Children with Learning and Autism Spectrum Disorders by Serena Wieder Ph.D., Harry Wachs O.D.
The Psychology of a Child by Jean Piaget and Barbel Inhelder
Piaget Handbook for Teachers and Parents: Children in the Age of Discovery, Preschool-Third Grade (Early Childhood Education Series) by Rosemary Peterson, Victoria Felton-Collins, Victoria F. Collins
Thinking Goes to School: Piaget's Theory in Practice by Hans G. Furth, Harry Wachs
Supporting the Emotional Needs of the Gifted
Visual-Spacial Thinking - Research Paper by Harry Wachs, O.D.