EDIT MAIN
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Those District's in BOLD are Package Plan Members. 
All others are basic members with SSDA:

District Member Directory

Achieve Charter School of Paradise, Inc.
Alexander Valley Elementary School District
Allensworth Elementary School District
Alpaugh Unified School District
Alpine County Unified School District
Alpine Union School District
Alta Dutch Flat Union Elementary School District
Alta Vista Elementary School District
Alview-Dairyland Union Elementary School District
Anderson Union High School District
Anderson Valley Unified School District
Arcata Elementary School District
Arcohe Union Elementary School District
Auburn Union School District
Baker Valley Unified School District
Ballico-Cressey School District
Bangor Union Elementary School District
Bass Lake Joint Union Elementary School District
Bella Vista Elementary School District
Bennett Valley Union Elementary School District
Big Creek Elementary School District
Big Lagoon Union Elementary School District
Big Pine Unified School District
Big Springs Union Elementary School District
Big Sur Unified School District
Biggs Unified School District
Bishop Unified School District
Bitterwater-Tully Union Elementary School District
Black Oak Mine Unified School District
Blake Elementary School District
Blue Lake Union Elementary
Borrego Springs Unified School District
Bradley Union Elementary School District
Bret Harte Union High School District
Bridgeville Elementary School District
Browns Elementary School District
Buellton Union Elementary School District
Buena Vista Elementary School District
Butte Valley Unified School District
Butteville Union School District
Buttonwillow Union School District
Caliente Union Elementary School District
California Montessori Project
Calistoga Joint Unified School District
Camino Union Elementary School District
Canyon School District
Capay Joint Union Elementary School District
Cardiff School District
Caruthers Unified School District
Cayucos Elementary School District
Chawanakee Unified School District
Chowchilla Elementary School District
Chowchilla Union High School District
Cinnabar Elementary School District
Clay Joint Elementary School District
Clear Creek Elementary School District
Coalinga-Huron Unified School District
Coast Unified School District
Cold Spring Elementary School District
Columbia Union School District
Columbine Elementary School District
CORE Butte Charter School
CORE Charter School
Corning Union Elementary School District
Corning Union High School District
Coronado Unified School District
Cuddeback Union Elementary School District
Cutten Elementary School District
Da Vinci Schools
Dehesa Elementary School District
Delphic Elementary School District
Desert Center Unified School District
Di Giorgio Elementary School District
Dos Palos Oro-Loma Joint Unified School District
Ducor Union Elementary School District
Dunsmuir Joint Union High School District
Dunsmuir Union Elementary School District
Durham Unified School District
Earlimart Elementary School District
Eastern Sierra Unified School District
Edison Elementary School District
El Nido Elementary School District
El Tejon Unified School District
Elk Hills Elementary School District
Enterprise Elementary School District
Esparto Unified School District
Fairfax Elementary School District
Fall River Joint Unified School District
Ferndale Unified School District
Fieldbrook Elementary School District
Firebaugh-Las Deltas Unified School District
Foresthill Union Elementary School District
Forestville Union Elementary School District
Fort Bragg Unified School District
Fort Ross Elementary School District
Fort Sage Unified School District
Fortuna Union High School District
Fortune School of Education
Franklin Elementary School District
Freshwater Elementary School District
Galt Joint Union High School District
Garfield Elementary School District
Geyserville Unified School District
Golden Feather Union Elementary School District
Golden Plains Unified School District
Golden Valley Unified School District
Gorman Joint School District
Gratton Elementary School District
Graves Elementary School District
Grenada Elementary School District
Guerneville Elementary School District
Gustine Unified School District
Hamilton Unified School District
Happy Camp Union Elementary School District
Happy Valley Elementary School District
Happy Valley Union School District
Harmony Union Elementary School District
Helendale Elementary School District
Heritage Peak Charter School
Hickman Community Charter District
Hilmar Unified School District
Hope Elementary School District - Tulare
Horicon Elementary School District
Hornbrook Elementary School District
Howell Mountain Elementary School District
Hughes-Elizabeth Lakes Union Elementary School District
Hydesville Elementary School District
Jamul-Dulzura Union Elementary School District
John Swett Unified School District
Julian Union Elementary School District
Julian Union High School District
Junction Elementary School District - Shasta
Junction Elementary School District - Siskiyou
Kelseyville Unified School District
Kenwood Elementary School District
Kernville Union Elementary School District
Keyes Union Elementary School District
King City Union School District
Kings River Union Elementary School District
Kings River-Hardwick Union Elementary School District
Kit Carson Union School District
Klamath-Trinity Joint Unified School District
Kneeland Elementary School District
Knights Ferry Elementary School District
Laguna Beach Unified School District
Laguna Joint Elementary School District
Lagunita Elementary School District
Lake Elementary School District
Lakeside Union - Kern
Lakeside Union Elementary School District - Kings
Lamont School District
Lassen Union High School District
Lassen View Union Elementary School District
Latrobe School District
Le Grand Union Elementary School District
Le Grand Union High School District
Lemoore Union Elementary School District
Liberty Elementary School District
Lincoln Elementary School District
Little Shasta Elementary School District
Live Oak Unified School District
Livingston Union Elementary School District
Loma Prieta Joint Union Elementary School District
Lone Pine Unified School District
Lost Hills Union Elementary School District
Lucerne Elementary School District
Lucerne Valley Unified School District
Luther Burbank School District
Mammoth Unified School District
Maple Elementary School District
Marcum-Illinois Union School District
Maricopa Unified School District
Mariposa County Unified School District
Mark Twain Union Elementary School District
Mattole Unified School District
McCloud Union Elementary School District
McKittrick Elementary School District
Meadows Union Elementary School District
Merced River School District
Meridian Elementary School District
Midway Elementary School District
Millville Elementary School District
Monroe Elementary School District
Monson-Sultana Joint Union Elementary School District
Montague Elementary School District
Monte Rio Union School District
Montgomery Elementary School District
Mother Lode Union Elementary School District
Mountain Empire Unified School District
Mountain Valley Unified School District
Mt. Baldy Joint Elementary School District 
Mt. Shasta Union School District
Mulberry School District
Needles Unified School District
Nevada City Elementary School District
Nevada Joint Union High School District
New Hope Elementary School District
Nord Country School
North County Joint Union Elementary School District
North Cow Creek Elementary School District
Northern Humboldt Union High School District
Nuestro Elementary School District
Oak Grove Union Elementary School District
Oak Valley Union Elementary School District
Orchard School District
Oroville City Elementary School District
Oroville Union High School District
Outside Creek Elementary School District
Owens Valley Unified School District
Pacific Elementary School District
Pacific Grove Unified School District
Pacific Union Elementary
Pacific Union Elementary School District - Fresno
Palo Verde Union Elementary School District
Paradise Charter Middle School
Paradise Unified School District
Peninsula Union School District
Penn Valley Union Elementary School District
Pierce Joint Unified School District
Pine Ridge School District
Pivot Charter School - North Bay
Pivot Charter School - San Diego
Pivot Charter School North Valley II
Pivot Charter School Riverside
Pivot Charter Schools/Roads Education Organization
Pixley Union Elementary School District
Placer Hills Union Elementary School District
Placerville Union Elementary School District
Plainsburg Union Elementary School District
Planada Elementary School District
Pleasant Grove Joint Union Elementary School District
Pleasant Ridge Union School District
Pleasant Valley Joint Union Elementary School District
Plumas Unified School District
Pollock Pines Elementary School District
Pond Union Elementary School District
Pope Valley Union School District
Potter Valley Community Unified School District
Princeton Joint Unified School District
Raisin City Elementary School District
Ravendale-Termo Elementary School District
Reed Union Elementary School District
Richfield Elementary School District
Richgrove Elementary School District
Richland School District
Richmond Elementary School District
Rio Bravo-Greeley Union Elementary School District
Rio Dell Elementary School District
River Islands Technology Academy
Riverdale Joint Unified School District
Rockford Elementary School District
Round Valley Joint Elementary School District
Round Valley Unified School District
Sage Oak Charter Schools
Salida Union School District
San Ardo Union Elementary School District
San Lucas Union Elementary School District
San Pasqual Union School District
San Pasqual Valley Unified School District
Saucelito Elementary School District
Savanna Elementary School District
Scott Valley Unified School District
Sebastopol Union Elementary School District
Seiad Elementary School District
Semitropic School District
Sequoia Union Elementary School District
Shaffer Union School District
Shandon Joint Unified School District
Sierra Montessori Academy
Sierra Unified School District
Sierra-Plumas Joint Unified School District
Silver Fork Elementary School District
Silver Valley Unified School District
Siskiyou Union High School District
South Fork Union School District
Southside Elementary School District
Spencer Valley Elementary School District
Springville Union Elementary School District
St. Helena Unified School District
Stone Corral Elementary School District
Strathmore Union Elementary School District
Sundale Union Elementary School District
Sunnyside Union Elementary School District
Susanville Elementary School District
Taft City School District
Taft Union High School District
Terra Bella Union School District
Thermalito Union School District
Three Rivers Union Elementary School District
Tipton Elementary School District
Trinidad Union Elementary School District
Trona Joint Unified School District
Tulelake Basin Joint Unified School District
Twin Hills Union Elementary School District

Upper Lake Unified School District

Vallecitos School District
Valley Home Joint School District
Vineland Elementary School District
Vista Del Mar Union School District
Warner Unified School District
Wasco Union High School District
Washington Colony Elementary School District
Washington Union Elementary School District
Waterford Unified School District
Waukena Joint Union Elementary School District
Weed Union Elementary School District
West Park Elementary School District
West Side Union Elementary School District
Westside Elementary School District
Williams Unified School District
Willits Unified School District
Willows Unified School District
Wilmar Union Elementary School District
Wilsona Elementary School District
Winship-Robbins Elementary School District
Winters Joint Unified School District
Woodville Union School District
Yosemite Unified School District
Yreka Union Elementary School District
Yreka Union High School District