Icef Vista Elementary Academy: 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	27,440	2442.9	− 2436	6.9	× 54 / 164	2.3
4	27,441	2468.6	− 2485	−16.4	× 55 / 164	−5.5
5	27,444	2481.1	− 2528	−46.9	× 55 / 164	−15.7
Sum, rounded to a whole point						−19

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	25,524	2436.5	− 2436	0.5	× 56 / 172	0.2
4	25,526	2457.3	− 2485	−27.7	× 58 / 172	−9.3
5	25,527	2493.5	− 2528	−34.5	× 58 / 172	−11.6
Sum, rounded to a whole point						−21

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	26,001	2400.5	− 2436	−35.5	× 57 / 175	−11.6
4	26,003	2479.6	− 2485	−5.4	× 59 / 175	−1.8
5	26,005	2460.4	− 2528	−67.6	× 59 / 175	−22.8
Sum, rounded to a whole point						−36

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	25,980	2425.3	− 2436	−10.7	× 58 / 176	−3.5
4	25,982	2507.5	− 2485	22.5	× 59 / 176	7.5
5	25,984	2526.8	− 2528	−1.2	× 59 / 176	−0.4
Sum, rounded to a whole point						4

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	26,125	2448.2	− 2436	12.2	× 51 / 171	3.6
4	26,126	2451.5	− 2485	−33.5	× 58 / 171	−11.4
5	26,127	2491.5	− 2528	−36.5	× 62 / 171	−13.2
Sum, rounded to a whole point						−21

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	26,076	2422.9	− 2436	−13.1	× 43 / 152	−3.7
4	26,077	2434.3	− 2485	−50.7	× 56 / 152	−18.7
5	26,078	2463.2	− 2528	−64.8	× 53 / 152	−22.6
Sum, rounded to a whole point						−45

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	26,035	2422.5	− 2436	−13.5	× 48 / 150	−4.3
4	26,036	2482.6	− 2485	−2.4	× 41 / 150	−0.7
5	26,037	2450.3	− 2528	−77.7	× 61 / 150	−31.6
Sum, rounded to a whole point						−37

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	25,885	2433.0	− 2436	−3	× 44 / 139	−0.9
4	25,886	2481.6	− 2485	−3.4	× 49 / 139	−1.2
5	25,887	2517.3	− 2528	−10.7	× 46 / 139	−3.5
Sum, rounded to a whole point						−6

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	25,774	2450.9	− 2436	14.9	× 51 / 151	5
4	25,775	2514.3	− 2485	29.3	× 45 / 151	8.7
5	25,776	2492.9	− 2528	−35.1	× 55 / 151	−12.8
Sum, rounded to a whole point						1

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −19, −21, −36, 4, −21, −45, −37, −6, 1 → −20
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 2 · 2016→2017: 15 · 2017→2018: 40 · 2018→2019: 25 · 2019→2022: 24 · 2022→2023: 8 · 2023→2024: 31 · 2024→2025: 7 → average 19
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 19 × 2.66 = 50.5. Upper limit 30.5, lower limit −70.5.

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.