A Glossary of Terms

This glossary explains common terms used in the field of intellectual and developmental disability (I/DD). It is written for individuals, families, and service coordinators. Terms with special meaning in California are noted. Download here.

Paper and Practice

Person-centered planning in California was written in law in 1992. That was the year that the Lanterman Act was amended to require that IPPs reflect a person’s own preferences, strengths, culture, and vision for their life. To this day, individuals and families often report a difference between that promise and what happens. You can download … Read more

What California’s Master Plan for Developmental Services Means for You

In March 2025, California released the Master Plan for Developmental Services: A Community-Driven Vision. It’s a big deal — the most ambitious effort in decades to rethink how the state supports people with intellectual and developmental disabilities (I/DD) and their families. Read a summary here.

How to Read Your Regional Center Assessment

If you have been referred to a regional center in California — or if you are a family member supporting someone who has — you may have heard the words “assessment” or “evaluation” and wondered – what does that actually mean? What are they looking at? And what happens with the results? You can find … Read more

7 Questions that Those Who Support People with Disabilities Should Be Able to Answer

Those who support and those who develop plans with people who have disabilities should be able to answer the following 7 questions. The plans that are written with people who use disability services should contain these answers. The services and supports provided should reflect the answers to these questions.