Costano Elementary School
Elementary school in East Palo Alto, CA · Ravenswood City Elementary · Grades K-5
On the spring 2026 state tests, 18% of Costano Elementary School students met or exceeded California's reading (ELA) standard and 16% met the math standard. In reading, that is 5 points above the Ravenswood City Elementary average (13%) and 31 points below the California average (49%). Its reading result is higher than 9% of Bay Area elementary schools, and it ranks 1st of 3 public elementary schools in East Palo Alto. Reading results in 2026 were 11 points higher than in 2024, and math results were 8 points higher than in 2024.
Test scores, 2024 to 2026
| Subject | Spring 2024 | Spring 2025 | Spring 2026 | Change |
|---|---|---|---|---|
| Reading (ELA) | 7% | 16% | 18% | +11 pts |
| Math | 8% | 12% | 16% | +8 pts |
Compared with nearby averages
| Spring 2026 | Reading (ELA) | Math |
|---|---|---|
| Costano Elementary School | 18% | 16% |
| Ravenswood City Elementary | 13% | 10% |
| San Mateo County | 59% | 53% |
| California | 49% | 38% |
Results by grade, spring 2026
| Grade | Reading (ELA) | Math |
|---|---|---|
| 3rd grade | 10% | 22% |
| 4th grade | 29% | 23% |
| 5th grade | 15% | 3% |
Students are tested in grades 3 to 8 and 11. Each grade is a different group of students, so differences between grades are not a trend.
Homes near Costano Elementary School
The typical home value in ZIP code 94303, where Costano Elementary School is located, is $2.06M, up 3.1% over the past year (Zillow Home Value Index). Prices inside the school's attendance zone can differ.
Zillow and Redfin can both search for homes inside a school’s attendance zone and email you new listings. Search for the school by name on either site and save the search.
Nearby elementary schools
| Distance | School | Reading (ELA) | Math | Typical home value (ZIP) |
|---|---|---|---|---|
| 0.2 mi | Los Robles-Ronald McNair AcademyEast Palo Alto · Grades K-5 | 7% | 9% | $2.06M |
| 0.6 mi | Aspire East Palo Alto Charter CharterEast Palo Alto · Grades K-8 | 14% | 10% | $2.06M |
| 0.8 mi | Duveneck ElementaryPalo Alto · Grades K-5 | 73% | 76% | $2.06M |
| 1.3 mi | KIPP Valiant Community Prep CharterMenlo Park · Grades K-8 | 38% | 25% | $2.93M |
| 1.4 mi | Addison ElementaryPalo Alto · Grades K-5 | 78% | 74% | $4.34M |
| 1.4 mi | Walter Hays ElementaryPalo Alto · Grades K-5 | 77% | 74% | $4.34M |
School details
- Address
- 2086 Clarke Avenue, East Palo Alto, CA 94303
Get directions · See it on our map - Phone
- (650) 329-2830
- District
- Ravenswood City Elementary
- County
- San Mateo County
- Grades
- K-5
- Students
- 368 (2025-26)
- Type
- Elementary school · Traditional
- Website
- www.ravenswoodschools.org
- State school code
- 41689996044325
Common questions
How did Costano Elementary School do on state tests?
In spring 2026, 18% of students met or exceeded the reading (ELA) standard and 16% met the math standard, compared with 49% and 38% across California.
How many students attend Costano Elementary School?
368 students were enrolled in the 2025-26 school year, in grades K-5.
How much do homes cost near Costano Elementary School?
The typical home value in ZIP code 94303, where Costano Elementary School is located, is $2.06M, up 3.1% over the past year (Zillow Home Value Index). Prices inside the school's attendance zone can differ.
Does living near Costano Elementary School guarantee a spot?
No. Public schools assign students by attendance zone, which Ravenswood City Elementary sets and can change. Confirm the zone for a specific address with the district before you buy or rent.