The International Society of Arboriculture (ISA) Arborists' Study Guide
(2010 edition) is the required textbook.

The following topics are covered:

• Plant Classification and Nomenclature
• Tree Biology
• Soil Science
• Water and Nutrition
• Tree Selection and Installation
• Pruning
• Plant Health Care and Urban Forestry
• Risk Management and Support Systems
• Trees and Construction
• Tree Worker Safety
• Plant Disorders and Diagnosis
• Plant Identification