Santa Margarita Elementary School (Ranked Top 50% for 2026)

1 Carnes Rd.
Oceanside, CA 92058

( shown in map)

View full size Get directions

Top 50%

Tel: (760) 901-7900

santamargarita.oside.us

REQUEST INFO

SAVE SCHOOL

Serving 544 students in grades Kindergarten-8, Santa Margarita Elementary School ranks in the top 50% of all schools in California for overall test scores (math proficiency is top 50%, and reading proficiency is top 50%).

The percentage of students achieving is 40% (which is higher than the California state average of 34%). The percentage of students achieving is 54% (which is higher than the California state average of 47%).

The student-teacher ratio of 22:1 is higher than the California state level of 21:1.

Minority enrollment is 66% of the student body (majority Hispanic), which is lower than the California state average of 80% (majority Hispanic).

Quick Facts (2026)

Grades: Kindergarten-8
Enrollment: 544 students
Student-Teacher Ratio: 22:1
Minority Enrollment: 66%
: Top 50% in CA
: 40% (Top 50%)
: 54% (Top 30%)
: 30-34% (Top 50%)
Source: National Center for Education Statistics (NCES), CA Dept. of Education

School Overview

Santa Margarita Elementary School's student population of 544 students has grown by 7% over five school years.

The teacher population of 25 teachers has grown by 8% over five school years.

Awards

Blue Ribbon School - Selected in 2005

Grades Offered

Grades Kindergarten-8

View Data

Distribution of Students By Grade Trends
Grade	Santa Margarita Elementary School
Kind	121
1	70
2	77
3	53
4	55
5	48
6	38
7	49
8	33

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Total Students

544 students

View Data

Total Students Trends Over Years (1989-2025)
Year	Santa Margarita Elementary School
2025	544
2024	556
2023	541
2022	528
2021	507
2020	568
2019	568
2018	675
2017	675
2016	670
2015	699
2014	798
2013	700
2012	756
2011	514
2010	623
2009	627
2008	507
2007	530
2006	486
2005	408
2004	426
2003	487
2002	462
2001	438
2000	463
1999	584
1998	833
1997	825
1996	813
1995	703
1994	715
1993	725
1992	758
1991	644
1990	649
1989	639

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Total Classroom Teachers

25 teachers

View Data

Total Classroom Teachers Trends Over Years (1988-2025)
Year	Santa Margarita Elementary School
2025	25
2024	25
2023	24
2022	22
2021	23
2020	28
2019	28
2018	33
2017	33
2016	32
2015	33
2014	33
2013	26
2012	29
2010	28
2009	33
2008	31
2007	29
2006	24
2005	23
2004	24
2003	30
2002	25
2001	24
2000	22
1999	25
1998	36
1997	33
1996	30
1995	26
1994	26
1993	27
1992	24
1991	24
1990	24
1989	24
1988	25

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

School Calendar

View School Calendar

School Rankings

Santa Margarita Elementary School ranks within the top 50% of all 9,523 schools in California (based off of combined math and reading proficiency testing data).

The of Santa Margarita Elementary School is 0.69, which is more 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)

#2944 out of 9523 schools
(Top 50%)

View Data

Overall School Rank Trends Over Years (2010-2023)
Year	Santa Margarita Elementary School
2023	#2944
2022	#3128
2019	#1739
2018	#1757
2017	#2092
2016	#2212
2015	#3137
2013	#4016
2012	#4650
2011	#2795
2010	#2378

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

40%

34%

View Data

Math Proficiency Comparison Over Years (2010-2023)
Year	Santa Margarita Elementary School	California	Oceanside Unified School District
2023	40%	34%	29%
2022	37%	33%	29%
2019	62%	40%	36%
2018	57%	39%	35%
2017	54%	38%	35%
2016	52%	37%	34%
2015	41%	34%	32%
2013	63%	59%	59%
2012	60%	59%	59%
2011	69%	58%	58%
2010	67%	56%	56%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

54%

47%

View Data

Reading and Language Arts Proficiency Comparison Over Years (2010-2022)
Year	Santa Margarita Elementary School	California	Oceanside Unified School District
2022	54%	47%	41%
2019	64%	51%	45%
2018	64%	50%	35%
2017	58%	48%	42%
2016	55%	48%	43%
2015	45%	44%	36%
2013	52%	57%	53%
2012	52%	58%	55%
2011	60%	56%	54%
2010	62%	54%	52%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

30-34%

29%

Student-Teacher Ratio

22:1

21:1

View Data

Student-Teacher Ratio Comparison Over Years (1988-2025)
Year	Santa Margarita Elementary School	California	Oceanside Unified School District
2025	22:1	21:1
2024	22:1	21:1
2023	23:1	22:1	23:1
2022	24:1	22:1	23:1
2021	22:1	22:1	23:1
2020	20:1	23:1	24:1
2019	20:1	23:1	24:1
2018	20:1	23:1	23:1
2017	20:1	23:1	23:1
2016	21:1	24:1	23:1
2015	21:1	24:1	23:1
2014	24:1	24:1	25:1
2013	27:1	24:1	26:1
2012	26:1	24:1	25:1
2010	22:1	22:1	22:1
2009	19:1	21:1	21:1
2008	16:1	18:1	18:1
2007	18:1	22:1	21:1
2006	20:1	22:1	21:1
2005	18:1	22:1	20:1
2004	18:1	22:1	21:1
2003	16:1	21:1	20:1
2002	18:1	21:1	20:1
2001	18:1	21:1	21:1
2000	21:1	22:1	23:1
1999	23:1	22:1	22:1
1998	23:1	22:1	23:1
1997	25:1	24:1	24:1
1996	27:1	25:1	25:1
1995	27:1	25:1	25:1
1994	28:1	25:1	26:1
1993	27:1	25:1	26:1
1992	31:1	24:1	25:1
1991	27:1	24:1	24:1
1990	28:1	24:1	24:1
1989	27:1	24:1	25:1
1988	22:1	24:1	24:1

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

American Indian

n/a

View Data

American Indian Student Percentage Comparison Over Years (1988-2023)
Year	Santa Margarita Elementary School	California	Oceanside Unified School District
2023	1%	1%
2022	1%	1%
2016	1%	1%
2015	1%	1%
2014	1%	1%
2013	1%	1%	1%
2012	1%	1%
2011	1%	1%	1%
2010	1%	1%
2009	2%	1%	2%
2008	2%	1%	1%
2007	3%	2%	1%
2006	2%	1%	1%
2005	1%	2%	1%
2004	2%	2%	2%
2003	4%	2%	1%
2002	3%	2%	2%
2001	2%	2%	1%
2000	2%	1%	1%
1999	2%	1%	1%
1998	2%	1%	1%
1997	2%	1%	1%
1996	2%	1%	1%
1995	2%	1%	1%
1994	2%	1%	1%
1993	2%	1%	1%
1992	2%	1%	2%
1991	2%	1%
1990	1%	1%
1989	2%	1%	1%
1988	1%	1%	1%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Asian

12%

View Data

Asian Student Percentage Comparison Over Years (1989-2025)
Year	Santa Margarita Elementary School	California	Oceanside Unified School District
2025	3%	12%
2024	4%	12%
2023	3%	12%	5%
2022	5%	12%	4%
2021	7%	12%	4%
2020	4%	12%	5%
2019	4%	12%	5%
2018	3%	11%	5%
2017	3%	11%	5%
2016	2%	11%	5%
2015	2%	11%	5%
2014	2%	11%	6%
2013	2%	11%	5%
2012	2%	11%	6%
2011	3%	11%	6%
2010	2%	11%	5%
2009	2%	11%	5%
2008	4%	12%	8%
2007	6%	12%	8%
2006	8%	12%	9%
2005	9%	12%	8%
2004	8%	12%	8%
2003	7%	11%	8%
2002	7%	11%	8%
2001	7%	11%	9%
2000	7%	11%	9%
1999	10%	11%	9%
1998	7%	11%	9%
1997	8%	11%	9%
1996	7%	11%	9%
1995	8%	11%	9%
1994	11%	11%	9%
1993	8%	11%	9%
1992	8%	11%	9%
1991	11%	11%	10%
1990	10%	10%	10%
1989	9%	10%	10%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Hispanic

43%

56%

View Data

Hispanic Student Percentage Comparison Over Years (1989-2025)
Year	Santa Margarita Elementary School	California	Oceanside Unified School District
2025	43%	56%
2024	43%	56%
2023	40%	55%	57%
2022	38%	56%	57%
2021	39%	56%	58%
2020	36%	55%	57%
2019	36%	55%	57%
2018	31%	54%	57%
2017	31%	54%	57%
2016	29%	54%	57%
2015	28%	54%	56%
2014	30%	53%	54%
2013	35%	53%	54%
2012	31%	52%	54%
2011	29%	51%	55%
2010	25%	50%	55%
2009	25%	49%	53%
2008	30%	50%	55%
2007	26%	49%	54%
2006	24%	48%	53%
2005	22%	47%	51%
2004	20%	46%	50%
2003	16%	45%	49%
2002	17%	44%	48%
2001	16%	43%	46%
2000	18%	42%	44%
1999	18%	41%	43%
1998	18%	40%	42%
1997	16%	40%	41%
1996	16%	39%	39%
1995	16%	38%	38%
1994	17%	37%	37%
1993	20%	36%	36%
1992	18%	35%	34%
1991	20%	34%	34%
1990	19%	33%	32%
1989	22%	31%	30%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Black

View Data

Black Student Percentage Comparison Over Years (1989-2025)
Year	Santa Margarita Elementary School	California	Oceanside Unified School District
2025	8%	5%
2024	6%	5%
2023	7%	5%	4%
2022	7%	5%	4%
2021	6%	5%	4%
2020	8%	5%	4%
2019	8%	5%	4%
2018	11%	6%	5%
2017	11%	6%	5%
2016	11%	6%	5%
2015	12%	6%	5%
2014	9%	6%	6%
2013	8%	6%	6%
2012	10%	6%	7%
2011	14%	7%	7%
2010	13%	7%	7%
2009	15%	7%	8%
2008	13%	8%	8%
2007	16%	8%	9%
2006	18%	8%	9%
2005	14%	8%	10%
2004	16%	8%	10%
2003	18%	8%	11%
2002	18%	8%	11%
2001	19%	8%	12%
2000	21%	9%	13%
1999	26%	9%	14%
1998	25%	9%	15%
1997	24%	9%	15%
1996	23%	9%	15%
1995	26%	9%	15%
1994	23%	9%	15%
1993	22%	9%	15%
1992	25%	9%	15%
1991	19%	9%	15%
1990	21%	9%	15%
1989	22%	9%	16%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

White

34%

20%

View Data

White Student Percentage Comparison Over Years (1989-2025)
Year	Santa Margarita Elementary School	California	Oceanside Unified School District
2025	34%	20%
2024	37%	20%
2023	37%	21%	25%
2022	38%	21%	25%
2021	36%	22%	25%
2020	42%	23%	26%
2019	42%	23%	26%
2018	46%	24%	27%
2017	46%	24%	27%
2016	49%	24%	27%
2015	52%	24%	28%
2014	53%	25%	29%
2013	49%	25%	29%
2012	51%	26%	29%
2011	49%	27%	28%
2010	54%	27%	27%
2009	50%	28%	28%
2008	51%	29%	28%
2007	49%	29%	28%
2006	48%	31%	28%
2005	54%	31%	30%
2004	54%	32%	30%
2003	55%	34%	31%
2002	55%	35%	31%
2001	56%	36%	32%
2000	52%	37%	33%
1999	44%	38%	33%
1998	48%	39%	33%
1997	50%	39%	34%
1996	52%	40%	36%
1995	48%	41%	37%
1994	47%	42%	38%
1993	48%	43%	39%
1992	47%	44%	40%
1991	48%	45%	41%
1990	49%	47%	43%
1989	45%	49%	43%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Hawaiian

n/a

View Data

Native Hawaiian or Pacific Islander Student Percentage Comparison Over Years (2009-2014)
Year	Santa Margarita Elementary School	California	Oceanside Unified School District
2014	1%	1%	2%
2013	1%	1%	2%
2012	1%	1%	2%
2011	1%	1%	2%
2010	2%	1%	2%
2009	2%	1%	3%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Two or more races

11%

View Data

Two or More Races Student Percentage Comparison Over Years (2009-2025)
Year	Santa Margarita Elementary School	California	Oceanside Unified School District
2025	11%	6%
2024	9%	6%
2023	11%	6%	8%
2022	11%	5%	8%
2021	11%	5%	7%
2020	9%	4%	6%
2019	9%	4%	6%
2018	8%	4%	5%
2017	8%	4%	5%
2016	8%	4%	5%
2015	5%	3%	4%
2014	4%	3%	3%
2013	3%	3%	3%
2012	4%	3%	2%
2011	3%	2%	1%
2010	3%	3%	4%
2009	4%	3%	1%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

All Ethnic Groups

0.69

0.63

View Data

Diversity Score Comparison Over Years (1989-2025)
Year	Santa Margarita Elementary School	California	Oceanside Unified School District
2025	0.69	0.63
2024	0.67	0.63
2023	0.69	0.64	0.60
2022	0.70	0.63	0.60
2021	0.70	0.62	0.60
2020	0.68	0.63	0.61
2019	0.68	0.63	0.61
2018	0.68	0.64	0.60
2017	0.68	0.64	0.60
2016	0.66	0.64	0.60
2015	0.64	0.64	0.60
2014	0.63	0.65	0.62
2013	0.64	0.65	0.62
2012	0.64	0.65	0.62
2011	0.66	0.67	0.62
2010	0.63	0.67	0.62
2009	0.67	0.71	0.63
2008	0.64	0.65	0.61
2007	0.69	0.67	0.62
2006	0.69	0.66	0.63
2005	0.64	0.67	0.64
2004	0.64	0.67	0.64
2003	0.64	0.67	0.65
2002	0.64	0.67	0.66
2001	0.63	0.67	0.67
2000	0.65	0.67	0.68
1999	0.70	0.67	0.68
1998	0.68	0.67	0.69
1997	0.67	0.67	0.69
1996	0.65	0.67	0.69
1995	0.68	0.67	0.70
1994	0.69	0.67	0.69
1993	0.68	0.67	0.69
1992	0.68	0.67	0.69
1991	0.69	0.67	0.69
1990	0.68	0.66	0.69
1989	0.70	0.65	0.69

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

(22-23)

15.4%

27.7%

View Data

Chronic Absenteeism Rate (2021-2023)
Year	Santa Margarita Elementary School	California	Oceanside Unified School District
2023	15.4%	27.7%	32.6%
2022	13.6%	33%	42.4%
2021	7.5%	15.4%	19.4%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Eligible for

30%

54%

View Data

Free Lunch Eligibility Comparison Over Years (1994-2025)
Year	Santa Margarita Elementary School	California	Oceanside Unified School District
2025	30%	54%
2024	29%	54%
2023	28%	51%	49%
2022	25%	51%	49%
2021	19%	53%	46%
2020	17%	52%	48%
2019	17%	52%	48%
2018	19%	49%	43%
2017	19%	49%	43%
2016	15%	50%	45%
2015	19%	50%	46%
2014	21%	49%	47%
2013	19%	48%	44%
2011	23%	46%	43%
2010	20%	46%	42%
2009	18%	43%	37%
2008	18%	41%	36%
2007	19%	40%	41%
2006	14%	40%	35%
2005	18%	40%	42%
2004	18%	40%	39%
2003	17%	39%	36%
2002	19%	39%	27%
2001	20%	39%	36%
2000	26%	40%	39%
1999	25%	40%	39%
1998	48%	47%	54%
1997	52%	47%	53%
1996	50%	46%	55%
1995	45%	45%	52%
1994	49%	43%	48%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Eligible for

36%

View Data

Reduced-Price Lunch Eligibility Comparison Over Years (2000-2025)
Year	Santa Margarita Elementary School	California	Oceanside Unified School District
2025	36%	8%
2024	36%	8%
2023	39%	8%	18%
2022	37%	7%	17%
2021	20%	6%	11%
2020	20%	7%	10%
2019	20%	7%	10%
2018	26%	9%	15%
2017	26%	9%	15%
2016	27%	9%	14%
2015	38%	9%	17%
2014	35%	9%	15%
2013	31%	7%	13%
2011	29%	8%	13%
2010	30%	9%	14%
2009	26%	10%	15%
2008	27%	10%	17%
2007	25%	10%	14%
2006	24%	9%	12%
2005	25%	9%	14%
2004	24%	9%	14%
2003	29%	9%	13%
2002	21%	8%	8%
2001	23%	8%	11%
2000	27%	7%	12%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

School Statewide Testing

View Education Department Test Scores

School District Name

Oceanside Unified School District

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

REQUEST FREE INFORMATION

Frequently Asked Questions

What is Santa Margarita Elementary School's ranking?

Santa Margarita Elementary School is ranked #2944 out of 9,523 schools, which ranks it among the top 50% of public schools in California.

What schools are Santa Margarita Elementary School often compared to?

Santa Margarita Elementary Schoolis often viewed alongside schools like North Terrace Elementary School by visitors of our site.

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

40% of students have achieved math proficiency (compared to the 34% CA state average), while 54% of students have achieved reading proficiency (compared to the 47% CA state average).

How many students attend Santa Margarita Elementary School?

544 students attend Santa Margarita Elementary School.

What is the racial composition of the student body?

43% of Santa Margarita Elementary School students are Hispanic, 34% of students are White, 11% of students are Two or more races, 8% of students are Black, 3% of students are Asian, and 1% of students are Hawaiian.

What is the student-teacher ratio of Santa Margarita Elementary School?

Santa Margarita Elementary School has a student ration of 22:1, which is higher than the California state average of 21:1.

What grades does Santa Margarita Elementary School offer ?

Santa Margarita Elementary School offers enrollment in grades Kindergarten-8

What school district is Santa Margarita Elementary School part of?

Santa Margarita Elementary School is part of Oceanside Unified School District.

Popular comparisons: Santa Margarita Elementary School vs. North Terrace Elementary School

The nearest high school to Santa Margarita Elementary School is Oceanside Unified School District Adult Transition Program (2.0 miles away)

The nearest middle school and elementary school is North Terrace Elementary School (1.1 miles away)

Show me:

School
(Math and Reading Proficiency)

Location

Miles

Quick Facts

North Terrace Elementary School

(Math: 44% | Reading: 58%)
:

Top 30%

Add to Compare

141 Santa Rosa Dr.
Oceanside, CA 92058
(760) 901-7500

1.1 miles

Gr: K-8 | 771 students Student-teacher ratio: 24:1 Minority enrollment: 66%

Jefferson Middle School

(Math: 13% | Reading: 24%)
:

Bottom 50%

Add to Compare

823 Acacia St.
Oceanside, CA 92058
(760) 966-4700

1.8 miles

Gr: 6-8 | 441 students Student-teacher ratio: 18:1 Minority enrollment: 95%

Laurel Elementary School

(Math: 19% | Reading: 25-29%)
:

Bottom 50%

Add to Compare

1410 Laurel St.
Oceanside, CA 92058
(760) 966-4200

1.8 miles

Gr: K-5 | 352 students Student-teacher ratio: 22:1 Minority enrollment: 95%

Oceanside Unified School District Adult Transition Program

Special Education School

Add to Compare

707 Carey Rd.
Oceanside, CA 92058
(760) 901-7170

2 miles

Gr: 12 | 55 students Student-teacher ratio: 11:1 Minority enrollment: 85%

Mission Elementary School

(Math: 22% | Reading: 29%)
:

Bottom 50%

Add to Compare

2100 Mission Ave.
Oceanside, CA 92058
(760) 966-8700

2.1 miles

Gr: K-5 | 419 students Student-teacher ratio: 25:1 Minority enrollment: 93%

See more public schools near to Santa Margarita Elementary School

School Reviews

Review Santa Margarita Elementary School. Reviews should be a few sentences in length. Please include any comments on:

Quality of academic programs, teachers, and facilities
Availability of music, art, sports and other extracurricular activities

Recent Articles

June 24, 2026

Phone Bans Are Expanding: Will They Actually Help Your Child?

Phone bans are spreading in public schools nationwide. Learn how to evaluate whether a school's cellphone policy will improve your child's learning and well-being.