Index searching is an effective way to find information for a given subject. Secondary sources often have multivolumes, and for relevant subjects material can be included in different volumes. Searching and finding the indexing term for education law can help you quickly identify relevant pages. Be careful, though, publications do not use standard indexing terms (e.g., an encyclopedia might use education law and another might use schools and education). For Education Law, the indexed term usually is listed as a top level index, with related education law subjects listed below in alphabetical order.
Like any treatise, Education law treatises are multivolume editions that provide extensive coverage of law. A good treatise will have extensive summaries of the law, citing to applicable state and federal primary sources. When would a treatise be helpful? You might want to know almost everything there is to know about education law. Treatises are also useful for comparing state and federal law; for example a treatise may have a survey of the corresponding state statutes for a particular legal topic.
This seven volume set provides extensive coverage of state and federal education law. The set also has forms and reference material that includes tables that list applicable state statutes for several major education law topics. Also available on Lexis Advance for College of Law students and faculty.