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Del Sur Senior Elementary School

9023 West Ave. H
Lancaster, CA 93536

( shown in map)

Bottom 50%

dragons.westsideunion.com

Serving 758 students in grades Kindergarten-8, Del Sur Senior Elementary School ranks in the bottom 50% of all schools in California for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).

The percentage of students achieving is 20% (which is lower than the California state average of 33%). The percentage of students achieving is 35% (which is lower than the California state average of 47%).

The student:teacher ratio of 26:1 is higher than the California state level of 21:1.

Minority enrollment is 70% of the student body (majority Hispanic), which is lower than the California state average of 80% (majority Hispanic).

Quick Stats (2025)

Grades: Kindergarten-8
Enrollment: 758 students
Student:Teacher Ratio: 26:1
Minority Enrollment: 70%
: Bottom 50% in CA
: 20% (Btm 50%)
: 35% (Btm 50%)
: 20-24% (Btm 50%)
Source: National Center for Education Statistics (NCES), CA Dept. of Education

School Overview

Del Sur Senior Elementary School's student population of 758 students has declined by 7% over five school years.

The teacher population of 29 teachers has declined by 9% over five school years.

Grades Offered

Grades Kindergarten-8

View Data

Distribution of Students By Grade Trends
Grade	Del Sur Senior Elementary School
Kind	81
1	67
2	70
3	61
4	61
5	67
6	85
7	152
8	114

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Total Students

758 students

View Data

Total Students Trends Over Years (1987-2023)
Year	Del Sur Senior Elementary School
2023	741
2022	711
2021	794
2020	816
2019	816
2018	796
2017	796
2016	715
2015	710
2014	751
2013	753
2012	795
2011	841
2010	848
2009	894
2008	918
2007	864
2006	777
2005	794
2004	757
2003	757
2002	653
2001	612
2000	608
1999	604
1998	607
1997	637
1996	751
1995	682
1994	725
1993	813
1992	799
1991	783
1990	636
1989	621
1988	464
1987	367

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Gender %

Total Classroom Teachers

29 teachers

View Data

Total Classroom Teachers Trends Over Years (1990-2023)
Year	Del Sur Senior Elementary School
2023	27
2022	28
2021	30
2020	32
2019	32
2018	29
2017	29
2016	27
2015	28
2014	29
2013	28
2012	32
2010	36
2009	39
2008	45
2007	34
2006	28
2005	35
2004	37
2003	35
2002	33
2001	30
2000	32
1999	34
1998	32
1997	29
1996	31
1995	28
1994	26
1993	31
1992	27
1991	27
1990	25

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School Calendar

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School Rankings

Del Sur Senior Elementary School ranks within the bottom 50% of all 9,602 schools in California (based off of combined math and reading proficiency testing data).

The of Del Sur Senior Elementary School is 0.60, which is less than the diversity score at state average of 0.63. The school's diversity has stayed relatively flat over five school years.

This School

State Level (CA)

#6212 out of 9602 schools
(Bottom 50%)

View Data

Overall School Rank Trends Over Years (2010-2022)
Year	Del Sur Senior Elementary School
2022	#6212
2019	#5592
2018	#5726
2017	#5648
2016	#5041
2015	#4388
2013	#3951
2012	#3277
2011	#3852
2010	#4279

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20%

33%

View Data

Math Proficiency Comparison Over Years (2010-2022)
Year	Del Sur Senior Elementary School	California	Westside Union Elementary School District
2022	20%	33%	28%
2019	31%	40%	34%
2018	26%	39%	33%
2017	27%	38%	32%
2016	30%	37%	34%
2015	27%	34%	33%
2013	57%	59%	61%
2012	61%	59%	61%
2011	58%	58%	60%
2010	51%	56%	55%

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35%

47%

View Data

Reading and Language Arts Proficiency Comparison Over Years (2010-2022)
Year	Del Sur Senior Elementary School	California	Westside Union Elementary School District
2022	35%	47%	44%
2019	43%	51%	49%
2018	44%	50%	33%
2017	39%	48%	47%
2016	42%	48%	48%
2015	41%	44%	47%
2013	60%	57%	63%
2012	67%	58%	66%
2011	60%	56%	64%
2010	57%	54%	61%

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20-24%

29%

Student : Teacher Ratio

26:1

21:1

View Data

Student-Teacher Ratio Comparison Over Years (1990-2023)
Year	Del Sur Senior Elementary School	California	Westside Union Elementary School District
2023	27:1	22:1	26:1
2022	25:1	21:1	25:1
2021	26:1	22:1	26:1
2020	26:1	23:1	27:1
2019	26:1	23:1	27:1
2018	27:1	23:1	27:1
2017	27:1	23:1	27:1
2016	26:1	24:1	27:1
2015	25:1	24:1	27:1
2014	26:1	24:1	27:1
2013	27:1	24:1	27:1
2012	25:1	23:1	27:1
2010	24:1	21:1	25:1
2009	23:1	20:1	26:1
2008	20:1	18:1	23:1
2007	25:1	21:1	26:1
2006	28:1	20:1	27:1
2005	23:1	21:1	23:1
2004	20:1	21:1	22:1
2003	22:1	20:1	22:1
2002	20:1	20:1	22:1
2001	20:1	20:1	22:1
2000	19:1	21:1	21:1
1999	18:1	21:1	21:1
1998	19:1	21:1	22:1
1997	22:1	23:1	25:1
1996	24:1	25:1	26:1
1995	25:1	25:1	26:1
1994	28:1	25:1	27:1
1993	26:1	25:1	27:1
1992	29:1	24:1	30:1
1991	29:1	24:1	27:1
1990	26:1	24:1	26:1

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American Indian

n/a

View Data

American Indian Student Percentage Comparison Over Years (1989-2013)
Year	Del Sur Senior Elementary School	California	Westside Union Elementary School District
2013	1%	1%
2012	1%	1%
2011	2%	1%	1%
2010	1%	1%	1%
2009	1%	1%	1%
2008	2%	1%	1%
2007	2%	2%	1%
2006	2%	1%	2%
2003	1%	2%	2%
2002	2%	2%	1%
2001	2%	2%	2%
2000	1%	1%	1%
1999	1%	1%	1%
1998	1%	1%	1%
1997	1%	1%	2%
1996	1%	1%	2%
1995	1%	1%	2%
1994	1%	1%	2%
1993	1%	1%	1%
1992	1%	1%	2%
1989	2%	1%	1%

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Asian

12%

View Data

Asian Student Percentage Comparison Over Years (1990-2023)
Year	Del Sur Senior Elementary School	California	Westside Union Elementary School District
2023	1%	12%	4%
2022	1%	12%	4%
2020	1%	12%	4%
2019	1%	12%	4%
2018	1%	11%	4%
2017	1%	11%	4%
2014	1%	11%	6%
2013	2%	11%	6%
2012	3%	11%	6%
2011	3%	11%	6%
2010	5%	11%	6%
2009	4%	11%	6%
2008	4%	12%	6%
2007	4%	12%	7%
2006	4%	12%	6%
2005	3%	12%	6%
2004	4%	12%	6%
2003	3%	11%	5%
2002	3%	11%	5%
2001	3%	11%	4%
2000	4%	11%	5%
1999	4%	11%	4%
1998	4%	11%	4%
1997	4%	11%	4%
1996	4%	11%	4%
1995	4%	11%	5%
1994	5%	11%	5%
1993	5%	11%	4%
1992	4%	11%	4%
1991	4%	11%	4%
1990	3%	10%	3%

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Hispanic

55%

56%

View Data

Hispanic Student Percentage Comparison Over Years (1991-2023)
Year	Del Sur Senior Elementary School	California	Westside Union Elementary School District
2023	54%	55%	55%
2022	51%	56%	53%
2021	48%	56%	50%
2020	43%	55%	48%
2019	43%	55%	48%
2018	43%	54%	45%
2017	43%	54%	45%
2016	39%	54%	43%
2015	39%	54%	42%
2014	41%	53%	41%
2013	39%	53%	39%
2012	37%	52%	38%
2011	35%	51%	36%
2010	32%	50%	34%
2009	33%	49%	33%
2008	34%	50%	33%
2007	30%	49%	30%
2006	23%	48%	26%
2005	16%	47%	21%
2004	18%	46%	19%
2003	17%	45%	18%
2002	20%	44%	17%
2001	21%	43%	17%
2000	19%	42%	17%
1999	15%	41%	15%
1998	15%	40%	16%
1997	14%	40%	15%
1996	15%	39%	13%
1995	17%	38%	15%
1994	17%	37%	14%
1993	15%	36%	14%
1992	16%	35%	12%
1991	17%	34%	12%

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Black

View Data

Black Student Percentage Comparison Over Years (1991-2023)
Year	Del Sur Senior Elementary School	California	Westside Union Elementary School District
2023	7%	5%	10%
2022	8%	5%	10%
2021	11%	5%	10%
2020	8%	5%	10%
2019	8%	5%	10%
2018	9%	6%	11%
2017	9%	6%	11%
2016	9%	6%	11%
2015	9%	6%	11%
2014	8%	6%	11%
2013	8%	6%	12%
2012	10%	6%	12%
2011	10%	7%	13%
2010	10%	7%	14%
2009	10%	7%	14%
2008	9%	8%	14%
2007	9%	8%	13%
2006	8%	8%	12%
2005	8%	8%	13%
2004	9%	8%	11%
2003	9%	8%	10%
2002	9%	8%	10%
2001	9%	8%	9%
2000	9%	9%	9%
1999	8%	9%	11%
1998	8%	9%	9%
1997	8%	9%	9%
1996	7%	9%	10%
1995	4%	9%	8%
1994	6%	9%	8%
1993	6%	9%	7%
1992	5%	9%	5%
1991	6%	9%	5%

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White

30%

20%

View Data

White Student Percentage Comparison Over Years (1991-2023)
Year	Del Sur Senior Elementary School	California	Westside Union Elementary School District
2023	33%	21%	25%
2022	36%	21%	27%
2021	37%	22%	29%
2020	42%	23%	32%
2019	42%	23%	32%
2018	41%	24%	35%
2017	41%	24%	35%
2016	45%	24%	37%
2015	48%	24%	38%
2014	45%	25%	38%
2013	46%	25%	39%
2012	45%	26%	40%
2011	47%	27%	41%
2010	51%	27%	43%
2009	49%	28%	44%
2008	51%	29%	46%
2007	55%	29%	49%
2006	63%	31%	54%
2005	65%	31%	56%
2004	69%	32%	60%
2003	70%	34%	65%
2002	66%	35%	67%
2001	65%	36%	68%
2000	67%	37%	68%
1999	72%	38%	69%
1998	72%	39%	70%
1997	73%	39%	70%
1996	73%	40%	71%
1995	74%	41%	70%
1994	71%	42%	71%
1993	73%	43%	74%
1992	74%	44%	77%
1991	73%	45%	79%

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Hawaiian

n/a

View Data

Native Hawaiian or Pacific Islander Student Percentage Comparison Over Years (2009-2012)
Year	Del Sur Senior Elementary School	California	Westside Union Elementary School District
2012	1%	1%
2009	1%	1%

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Two or more races

View Data

Two or More Races Student Percentage Comparison Over Years (2009-2023)
Year	Del Sur Senior Elementary School	California	Westside Union Elementary School District
2023	5%	6%	6%
2022	4%	5%	6%
2021	4%	5%	6%
2020	6%	4%	6%
2019	6%	4%	6%
2018	6%	4%	5%
2017	6%	4%	5%
2016	7%	4%	5%
2015	4%	3%	5%
2014	5%	3%	4%
2013	4%	3%	4%
2012	3%	3%	4%
2011	3%	2%	3%
2010	1%	3%	2%
2009	2%	3%	2%

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All Ethnic Groups

0.60

0.63

View Data

Diversity Score Comparison Over Years (1991-2023)
Year	Del Sur Senior Elementary School	California	Westside Union Elementary School District
2023	0.60	0.64	0.63
2022	0.61	0.63	0.64
2021	0.63	0.62	0.65
2020	0.63	0.63	0.66
2019	0.63	0.63	0.66
2018	0.64	0.64	0.66
2017	0.64	0.64	0.66
2016	0.64	0.64	0.67
2015	0.61	0.64	0.67
2014	0.63	0.65	0.68
2013	0.64	0.65	0.68
2012	0.66	0.65	0.69
2011	0.65	0.67	0.69
2010	0.64	0.67	0.68
2009	0.65	0.71	0.68
2008	0.62	0.65	0.66
2007	0.61	0.67	0.65
2006	0.56	0.66	0.62
2005	0.56	0.67	0.55
2004	0.51	0.67	0.54
2003	0.47	0.67	0.53
2002	0.52	0.67	0.52
2001	0.53	0.67	0.50
2000	0.51	0.67	0.49
1999	0.46	0.67	0.49
1998	0.46	0.67	0.48
1997	0.44	0.67	0.48
1996	0.44	0.67	0.48
1995	0.42	0.67	0.48
1994	0.47	0.67	0.47
1993	0.44	0.67	0.43
1992	0.43	0.67	0.39
1991	0.43	0.67	0.36

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Eligible for

44%

54%

View Data

Free Lunch Eligibility Comparison Over Years (1992-2023)
Year	Del Sur Senior Elementary School	California	Westside Union Elementary School District
2023	45%	51%	46%
2022	39%	51%	43%
2021	35%	53%	39%
2020	40%	52%	43%
2019	40%	52%	43%
2018	40%	49%	38%
2017	40%	49%	38%
2016	37%	50%	37%
2015	31%	50%	33%
2014	34%	49%	33%
2013	35%	48%	33%
2012	38%	9%	37%
2011	34%	46%	32%
2010	32%	46%	31%
2009	30%	43%	27%
2008	25%	41%	25%
2007	24%	40%	21%
2005	25%	40%	19%
2004	23%	40%	18%
2003	21%	39%	18%
2002	25%	39%	18%
2001	30%	39%	18%
2000	25%	40%	17%
1999	27%	40%	18%
1998	30%	47%	23%
1997	23%	47%	20%
1996	25%	46%	23%
1995	27%	45%	22%
1994	25%	43%	20%
1993	22%	41%	21%
1992	20%	38%	15%

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Eligible for

12%

View Data

Reduced-Price Lunch Eligibility Comparison Over Years (2001-2023)
Year	Del Sur Senior Elementary School	California	Westside Union Elementary School District
2023	10%	8%	11%
2022	16%	7%	13%
2021	12%	6%	10%
2020	8%	7%	6%
2019	8%	7%	6%
2018	6%	9%	6%
2017	6%	9%	6%
2016	8%	9%	7%
2015	9%	9%	7%
2014	8%	9%	7%
2013	7%	7%	7%
2011	9%	8%	9%
2010	7%	9%	8%
2009	7%	10%	8%
2008	10%	10%	8%
2007	10%	10%	8%
2005	5%	9%	6%
2004	6%	9%	6%
2003	6%	9%	5%
2002	5%	8%	5%
2001	3%	8%	5%

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School Statewide Testing

View Education Department Test Scores

School District Name

Westside Union Elementary School District

Source: National Center for Education Statistics (NCES), CA Dept. of Education

Profile last updated: 02/09/2025

Frequently Asked Questions

What is Del Sur Senior Elementary School's ranking?

Del Sur Senior Elementary School is ranked #6212 out of 9,602 schools, which ranks it among the bottom 50% of public schools in California.

What schools are Del Sur Senior Elementary School often compared to?

Del Sur Senior Elementary Schoolis often viewed alongside schools like Joe Walker Middle School by visitors of our site.

What percent of students have achieved state testing proficiency in math and reading?

20% of students have achieved math proficiency (compared to the 33% CA state average), while 35% of students have achieved reading proficiency (compared to the 47% CA state average).

How many students attend Del Sur Senior Elementary School?

758 students attend Del Sur Senior Elementary School.

What is the racial composition of the student body?

55% of Del Sur Senior Elementary School students are Hispanic, 30% of students are White, 9% of students are Black, 5% of students are Two or more races, and 1% of students are Asian.

What is the student:teacher ratio of Del Sur Senior Elementary School?

Del Sur Senior Elementary School has a student ration of 26:1, which is higher than the California state average of 21:1.

What grades does Del Sur Senior Elementary School offer ?

Del Sur Senior Elementary School offers enrollment in grades Kindergarten-8

What school district is Del Sur Senior Elementary School part of?

Del Sur Senior Elementary School is part of Westside Union Elementary School District.

School Reviews

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Quick Stats (2025)

Grades: Kindergarten-8
Enrollment: 758 students
Student:Teacher Ratio: 26:1
Minority Enrollment: 70%
: Bottom 50%
: 20% (Btm 50%)
: 35% (Btm 50%)
: 20-24% (Btm 50%)
Source: National Center for Education Statistics (NCES), CA Dept. of Education