H. Frank Dominguez Elementary: math

The shaded band is this school's normal range. If nothing about how it works changes, nearly every future year should land inside it. Zero means the typical student just meets the state standard. The small numbers under the years are how many students were tested.

Step 1 · Each year's result

For each grade tested, take the average (mean) scale score from the California Department of Education's results file, and subtract the lowest score that counts as "Standard Met" for that grade. That is the grade's distance from standard. Weight each grade by its share of the students tested, then add the grades up. Grades where the state hides the average because ten or fewer students tested are left out entirely.

2015 from sb_ca2015_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,853	2379.3	− 2436	−56.7	× 72 / 225	−18.1
4	67,855	2412.0	− 2485	−73	× 76 / 225	−24.7
5	67,857	2454.6	− 2528	−73.4	× 43 / 225	−14
6	67,859	2464.2	− 2552	−87.8	× 34 / 225	−13.3
Sum, rounded to a whole point						−70

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,863	2379.7	− 2436	−56.3	× 63 / 257	−13.8
4	62,865	2417.5	− 2485	−67.5	× 82 / 257	−21.5
5	62,868	2426.8	− 2528	−101.2	× 71 / 257	−28
6	62,869	2474.5	− 2552	−77.5	× 41 / 257	−12.4
Sum, rounded to a whole point						−76

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	64,656	2357.3	− 2436	−78.7	× 68 / 282	−19
4	64,658	2419.7	− 2485	−65.3	× 64 / 282	−14.8
5	64,659	2426.7	− 2528	−101.3	× 83 / 282	−29.8
6	64,661	2441.6	− 2552	−110.4	× 67 / 282	−26.2
Sum, rounded to a whole point						−90

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	64,741	2385.8	− 2436	−50.2	× 65 / 278	−11.7
4	64,743	2413.3	− 2485	−71.7	× 63 / 278	−16.2
5	64,745	2436.6	− 2528	−91.4	× 68 / 278	−22.4
6	64,747	2450.6	− 2552	−101.4	× 82 / 278	−29.9
Sum, rounded to a whole point						−80

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,099	2391.0	− 2436	−45	× 66 / 247	−12
4	65,100	2435.1	− 2485	−49.9	× 68 / 247	−13.7
5	65,101	2454.3	− 2528	−73.7	× 57 / 247	−17
6	65,102	2449.9	− 2552	−102.1	× 56 / 247	−23.1
Sum, rounded to a whole point						−66

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,180	2336.7	− 2436	−99.3	× 52 / 242	−21.3
4	65,181	2389.4	− 2485	−95.6	× 67 / 242	−26.5
5	65,182	2434.5	− 2528	−93.5	× 68 / 242	−26.3
6	65,183	2422.5	− 2552	−129.5	× 55 / 242	−29.4
Sum, rounded to a whole point						−104

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,175	2341.1	− 2436	−94.9	× 46 / 213	−20.5
4	65,176	2382.8	− 2485	−102.2	× 59 / 213	−28.3
5	65,177	2400.4	− 2528	−127.6	× 54 / 213	−32.3
6	65,178	2407.8	− 2552	−144.2	× 54 / 213	−36.6
Sum, rounded to a whole point						−118

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,141	2336.2	− 2436	−99.8	× 49 / 206	−23.7
4	65,142	2370.1	− 2485	−114.9	× 46 / 206	−25.7
5	65,143	2388.0	− 2528	−140	× 61 / 206	−41.5
6	65,144	2421.0	− 2552	−131	× 50 / 206	−31.8
Sum, rounded to a whole point						−123

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	64,899	2344.9	− 2436	−91.1	× 36 / 173	−19
4	64,900	2371.1	− 2485	−113.9	× 52 / 173	−34.2
5	64,901	2381.0	− 2528	−147	× 41 / 173	−34.8
6	64,902	2389.6	− 2552	−162.4	× 44 / 173	−41.3
Sum, rounded to a whole point						−129

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −70, −76, −90, −80, −66, −104, −118, −123, −129 → −95.1
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 6 · 2016→2017: 14 · 2017→2018: 10 · 2018→2019: 14 · 2019→2022: 38 · 2022→2023: 14 · 2023→2024: 5 · 2024→2025: 6 → average 13.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 13.4 × 2.66 = 35.6. Upper limit −59.5, lower limit −130.7.

Why 2.66? It is the standard factor from quality control, the work of Walter Shewhart and W. Edwards Deming. It turns "how much the result typically changes in a year" into "how far it can wander by chance alone".

Years with no result (no state tests were given in spring 2020) are skipped: the year-to-year change runs from the last year with a result to the next one.

Step 3 · Free or reduced-price meals

The share of enrolled students eligible for free or reduced-price meals. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.