Alpha: Cornerstone Academy Preparatory

Summary:

Alpha: Cornerstone Academy Preparatory is a public charter elementary school serving 520 students in grades K-8 in San Jose, California. It is part of the Alpha: Cornerstone Academy Preparatory District, which is ranked 216 out of 1,568 districts in the state and has a 4-star rating.

Alpha: Cornerstone Academy Preparatory consistently outperforms the state average in Smarter Balanced Assessments for English Language Arts/Literacy and Mathematics across all grade levels. For example, in 2023-2024, the school's proficiency rates were 61.36% in ELA and 52.69% in Math, compared to the state averages of 47.04% and 35.54% respectively. The school's performance is particularly strong in 8th grade ELA, where 71.43% of students were proficient or better, compared to the state average of 45.95%. Alpha: Cornerstone Academy Preparatory also outperforms the state in CAST Science assessments.

While Alpha: Cornerstone Academy Preparatory outperforms nearby traditional public schools in the Franklin-McKinley Elementary District, such as Jeanne R. Meadows Elementary and Shirakawa (George Senior) Elementary, its performance is not as strong as the nearby Rocketship Mosaic Elementary, another public charter school. Additionally, the school has a relatively high percentage of students eligible for free or reduced-price lunch, at 52.69% in 2022-2023, indicating a significant population of economically disadvantaged students. Despite these challenges, Alpha: Cornerstone Academy Preparatory has been able to achieve strong academic outcomes, particularly for its low-income students.


Detail:

Public, Charter K-8

 1598 Lucretia Ave.
       San Jose, CA  95122-3817


(408) 361-3876

District: Alpha: Cornerstone Academy Preparatory District

SchoolDigger Rank:
1301st of 5,862 California Elementary Schools


Student/teacher ratio:  21.4 Help
Number of students:  520

Racial breakdown:

Asian:
61.0%
Hispanic:
31.3%
Two or more races:
3.7%
more

Free/discounted lunch recipients:  52.7% Help


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Performance Trends
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Compare Details Alpha: Cornerstone Academy Preparatory ranks better than 77.8% of elementary schools in California. (See more...)
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Compare Details In 2024 the calculated Average Standard Score was 76.67. (See more...)
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Compare Details Alpha: Cornerstone Academy Preparatory ranks better than 85.3% of middle schools in California. (See more...)
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Compare Details In 2024 the calculated Average Standard Score was 83.38. (See more...)
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Chronic absenteeism in a school refers to a situation where students repeatedly miss school, with the threshold often defined as missing 10% or more of school days for any reason, excused or unexcused.
Schooldigger 2024 Rankings:

Alpha: Cornerstone Academy Preparatory:

SchoolDigger ranks Alpha: Cornerstone Academy Preparatory 1301st of 5862 California public elementary schools. (See Alpha: Cornerstone Academy Preparatory in the ranking list.)

Elementary School Test Score Ratings by Student Subgroup:


English Language Learner students:
Low Socio Economic Status students:
Female students:
Male students:
Asian students:
Hispanic students:

SchoolDigger ranks Alpha: Cornerstone Academy Preparatory 408th of 2777 California public middle schools. (See Alpha: Cornerstone Academy Preparatory in the ranking list.)

Middle School Test Score Ratings by Student Subgroup:


Low Socio Economic Status students:
Female students:
Male students:
Asian students:
Hispanic students:


Alpha: Cornerstone Academy Preparatory District:

SchoolDigger ranks Alpha: Cornerstone Academy Preparatory District 216th of 1568 California school districts. (See district ranking list.)


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Rank History for Alpha: Cornerstone Academy Preparatory

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Rank History for all elementary school students at Alpha: Cornerstone Academy Preparatory

Year Avg Standard Score Statewide Rank Total # Ranked Elementary Schools CA State Percentile SchoolDigger Rating
2019 90.19 633rd 5789 89.1%
2022 81.21 1136th 5883 80.7%
2023 69.02 1620th 5874 72.4%
2024 76.67 1301st 5862 77.8%
See the entire list of California Elementary School Rankings!

Rank History for elementary school English Language Learner students at Alpha: Cornerstone Academy Preparatory

Year Avg Standard Score Statewide Rank Total # Ranked Elementary Schools CA State Percentile SchoolDigger Rating
2019 94.26 109th 3275 96.7%
2022 58.21 833rd 3311 74.8%
2023 51.49 1110th 3250 65.8%
2024 49.18 1224th 3160 61.3%
See the entire list of Best California Elementary Schools for English Language Learner Students!

Rank History for elementary school Low Socio Economic Status students at Alpha: Cornerstone Academy Preparatory

Year Avg Standard Score Statewide Rank Total # Ranked Elementary Schools CA State Percentile SchoolDigger Rating
2019 95.09 137th 5173 97.4%
2022 86.71 477th 5264 90.9%
2023 65.37 1459th 5374 72.9%
2024 80.33 811th 5511 85.3%
See the entire list of Best California Elementary Schools for Low Socio Economic Status Students!

Rank History for elementary school Female students at Alpha: Cornerstone Academy Preparatory

Year Avg Standard Score Statewide Rank Total # Ranked Elementary Schools CA State Percentile SchoolDigger Rating
2019 86.80 733rd 5492 86.7%
2022 75.58 1300th 5635 76.9%
2023 69.29 1532nd 5617 72.7%
2024 79.91 1100th 5605 80.4%
See the entire list of Best California Elementary Schools for Female Students!

Rank History for elementary school Male students at Alpha: Cornerstone Academy Preparatory

Year Avg Standard Score Statewide Rank Total # Ranked Elementary Schools CA State Percentile SchoolDigger Rating
2019 90.53 543rd 5510 90.1%
2022 83.12 960th 5663 83.0%
2023 65.08 1724th 5650 69.5%
2024 67.39 1641st 5636 70.9%
See the entire list of Best California Elementary Schools for Male Students!

Rank History for elementary school Asian students at Alpha: Cornerstone Academy Preparatory

Year Avg Standard Score Statewide Rank Total # Ranked Elementary Schools CA State Percentile SchoolDigger Rating
2019 73.25 296th 1149 74.2%
2022 58.16 624th 1154 45.9%
2023 39.59 846th 1190 28.9%
2024 53.81 704th 1203 41.5%
See the entire list of Best California Elementary Schools for Asian Students!

Rank History for elementary school Hispanic students at Alpha: Cornerstone Academy Preparatory

Year Avg Standard Score Statewide Rank Total # Ranked Elementary Schools CA State Percentile SchoolDigger Rating
2019 63.17 1521st 4963 69.4%
2022 48.99 2273rd 5084 55.3%
2023 32.16 3535th 5098 30.7%
2024 39.25 3021st 5102 40.8%
See the entire list of Best California Elementary Schools for Hispanic Students!

Data source: test scores: California Department of Education, rankings: SchoolDigger.com

Rank History for Alpha: Cornerstone Academy Preparatory

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Rank History for all middle school students at Alpha: Cornerstone Academy Preparatory

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools CA State Percentile SchoolDigger Rating
2019 91.09 239th 2715 91.2%
2022 87.19 339th 2740 87.6%
2023 82.41 431st 2802 84.6%
2024 83.38 408th 2777 85.3%
See the entire list of California Elementary School Rankings!

Rank History for middle school English Language Learner students at Alpha: Cornerstone Academy Preparatory

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools CA State Percentile SchoolDigger Rating
2019 99.49 13th 1442 99.1%
See the entire list of Best California Elementary Schools for English Language Learner Students!

Rank History for middle school Low Socio Economic Status students at Alpha: Cornerstone Academy Preparatory

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools CA State Percentile SchoolDigger Rating
2019 97.51 31st 2369 98.7%
2022 94.28 87th 2458 96.5%
2023 82.07 294th 2549 88.5%
2024 85.06 266th 2575 89.7%
See the entire list of Best California Elementary Schools for Low Socio Economic Status Students!

Rank History for middle school Female students at Alpha: Cornerstone Academy Preparatory

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools CA State Percentile SchoolDigger Rating
2019 90.74 206th 2380 91.3%
2022 80.69 415th 2509 83.5%
2023 79.34 447th 2547 82.4%
2024 82.17 401st 2546 84.2%
See the entire list of Best California Elementary Schools for Female Students!

Rank History for middle school Male students at Alpha: Cornerstone Academy Preparatory

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools CA State Percentile SchoolDigger Rating
2019 89.06 264th 2407 89.0%
2022 90.15 238th 2527 90.6%
2023 82.20 389th 2558 84.8%
2024 78.43 462nd 2547 81.9%
See the entire list of Best California Elementary Schools for Male Students!

Rank History for middle school Asian students at Alpha: Cornerstone Academy Preparatory

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools CA State Percentile SchoolDigger Rating
2019 81.46 89th 745 88.1%
2022 69.89 241st 733 67.1%
2023 66.00 283rd 718 60.6%
2024 67.94 266th 741 64.1%
See the entire list of Best California Elementary Schools for Asian Students!

Rank History for middle school Hispanic students at Alpha: Cornerstone Academy Preparatory

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools CA State Percentile SchoolDigger Rating
2019 89.31 149th 2213 93.3%
2022 60.13 719th 2359 69.5%
2023 54.47 856th 2391 64.2%
2024 56.88 805th 2383 66.2%
See the entire list of Best California Elementary Schools for Hispanic Students!

Data source: test scores: California Department of Education, rankings: SchoolDigger.com

As you review the school rankings data, please be aware that some of the information from certain demographics is missing. The reason for this omission is that the data has been redacted from the source data itself due to low population samples in these specific demographic groups.

Redacting data from low population samples is a necessary step to ensure the reliability and accuracy of the results, as small sample sizes may not be representative of the broader population. Additionally, this measure helps protect the privacy of individuals belonging to these demographic groups.

Alpha: Cornerstone Academy Preparatory Test Scores
Tests: 
  
Grades: 
  
Years: 
  
Group by: 
State Scores:    
  
Subgroup: 









Data source: California Department of Education

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Enrollment information for Alpha: Cornerstone Academy Preparatory

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Year White African American Asian Hispanic American Indian Pacific Islander Two or More Races Not Specified Total
2019 22 4 323 171 1 1 21 0 543
2020 5 10 320 186 2 1 14 0 538
2021 9 7 321 170 2 1 11 0 521
2022 12 8 327 156 1 0 17 0 521
2023 12 9 317 163 0 0 19 0 520

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Enrollment/Ethnicity

For more information about how the Department of Education defines ethnicity, see Defining Race and Ethnicity Data, National Center for Education Statistics

Students eligible for free or discounted lunch at Alpha: Cornerstone Academy Preparatory

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Compare
Year # Students Full-time Teachers Student/Teacher ratio % Free/Discounted Lunch
2019 543 19.0 28.5 69.2
2020 538 n/a n/a 66.5
2021 521 21.0 24.8 58
2022 521 24.5 21.2 50.3
2023 520 24.2 21.4 52.7

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Students eligible for discounted/free lunch:

The National School Lunch Program (NSLP) provides low-cost or free meals to students in U.S. public and nonprofit private schools based on household income. Those with incomes below 130% of the poverty line receive free lunch, while those between 130% and 185% qualify for reduced-price lunch. The percentage of students receiving free or reduced-price lunch serves as a marker for poverty, as it reflects the socioeconomic status of families in a given school or district. A higher FRPL rate typically indicates a higher concentration of low-income families, suggesting that the school or district may face additional challenges in providing adequate resources and support for student success.

Student/Teacher Ratio Alpha: Cornerstone Academy Preparatory

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Compare
Year # Students Full-time Teachers Student/Teacher ratio % Free/Discounted Lunch
2019 543 19.0 28.5 69.2
2020 538 n/a n/a 66.5
2021 521 21.0 24.8 58
2022 521 24.5 21.2 50.3
2023 520 24.2 21.4 52.7

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Student-Teacher Ratio

Student/teacher ratio is calculated by dividing the total number of students by the total number of full-time equivalent teachers. Please note that a smaller student/teacher ratio does not necessarily translate to smaller class size. In some instances, schools hire teachers part time, and some teachers are hired for specialized instruction with very small class sizes. These and other factors contribute to the student/teacher ratio. Note: For private schools, Student/teacher ratio may not include Pre-Kindergarten.
Pre and Post Pandemic Data

Impact of COVID-19 on Alpha: Cornerstone Academy Preparatory

The coronavirus has had a profound impact on education in America. Learning shifted online overnight, attendance numbers dwindled, and enrollment decreased. SchoolDigger.com is making it easier for you to better assess how COVID-19 has impacted your school. Through the collection of pre-pandemic (2019) and current data, SchoolDigger.com is sharing test scores, enrollment numbers and school demographics from schools across the country – and we make it easy to see how impacted schools compare locally and statewide.

Rankings

Rank
Pre-pandemic (2018-2019)
Rank
Post pandemic (2022-2023)
Change (%)
Ranks 633rd of 5789 Elementary schoolsRanks 1620th of 5874 Elementary schools
 16.6%
Ranks 239th of 2715 Middle schoolsRanks 431st of 2802 Middle schools
 6.6%

Test Scores

% proficient
Pre-pandemic (2018-2019)
% proficient
Post pandemic (2022-2023)
Change (%)
3rd Grade English Language Arts/Literacy (Alpha: Cornerstone Academy Preparatory)82.861.7
 21.1%
   3rd Grade English Language Arts/Literacy (California)48.543
 5.6%
3rd Grade Mathematics (Alpha: Cornerstone Academy Preparatory)82.873.3
 9.4%
   3rd Grade Mathematics (California)50.245.1
 5.1%
4th Grade English Language Arts/Literacy (Alpha: Cornerstone Academy Preparatory)8539
 46%
   4th Grade English Language Arts/Literacy (California)49.543.7
 5.7%
4th Grade Mathematics (Alpha: Cornerstone Academy Preparatory)8045.8
 34.2%
   4th Grade Mathematics (California)44.940.8
 4.1%
5th Grade English Language Arts/Literacy (Alpha: Cornerstone Academy Preparatory)62.553.2
 9.3%
   5th Grade English Language Arts/Literacy (California)51.746.7
 5%
5th Grade Mathematics (Alpha: Cornerstone Academy Preparatory)7446.8
 27.2%
   5th Grade Mathematics (California)3833.4
 4.6%
5th Grade Science (Alpha: Cornerstone Academy Preparatory)54.232.3
 21.9%
   5th Grade Science (California)31.731.9
 0.1%
6th Grade English Language Arts/Literacy (Alpha: Cornerstone Academy Preparatory)63.659.7
 3.9%
   6th Grade English Language Arts/Literacy (California)48.544.2
 4.3%
6th Grade Mathematics (Alpha: Cornerstone Academy Preparatory)71.241.8
 29.4%
   6th Grade Mathematics (California)38.533.2
 5.3%
7th Grade English Language Arts/Literacy (Alpha: Cornerstone Academy Preparatory)79.375
 4.3%
   7th Grade English Language Arts/Literacy (California)51.447.4
 3.9%
7th Grade Mathematics (Alpha: Cornerstone Academy Preparatory)88.755
 33.7%
   7th Grade Mathematics (California)37.933.2
 4.7%
8th Grade English Language Arts/Literacy (Alpha: Cornerstone Academy Preparatory)7272.5
 0.5%
   8th Grade English Language Arts/Literacy (California)49.445.7
 3.8%
8th Grade Mathematics (Alpha: Cornerstone Academy Preparatory)7445
 29%
   8th Grade Mathematics (California)36.629.9
 6.7%
8th Grade Science (Alpha: Cornerstone Academy Preparatory)5037.5
 12.5%
   8th Grade Science (California)30.828.8
 2.1%

Student Body

Number of students
Pre-pandemic (2018-2019)
Number of students
Post pandemic (2022-2023)
Change (%)
Total Students543520
 4.2%
African American49
 125%
American Indian10
 100%
Asian323317
 1.9%
Hispanic171163
 4.7%
Pacific Islander10
 100%
White2212
 45.5%
Two or More Races2119
 9.5%
% Free/Discounted Lunch Recipients69.2%52.7%
 16.6%


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Frequently Asked Questions about Alpha: Cornerstone Academy Preparatory

In the 2022-23 school year, 520 students attended Alpha: Cornerstone Academy Preparatory.

Alpha: Cornerstone Academy Preparatory ranks 1301st of 5862 California elementary schools. SchoolDigger rates this school 4 stars out of 5.

Students at Alpha: Cornerstone Academy Preparatory are 61% Asian, 31% Hispanic, 4% Two or more races, 2% White, 2% African American.


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SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the California Department of Education.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.





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