Elkhorn Village 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	105,472	2392.7	− 2436	−43.3	× 59 / 362	−7.1
4	105,473	2404.9	− 2485	−80.1	× 53 / 362	−11.7
5	105,476	2411.4	− 2528	−116.6	× 47 / 362	−15.1
6	105,477	2467.5	− 2552	−84.5	× 62 / 362	−14.5
7	105,480	2452.2	− 2567	−114.8	× 74 / 362	−23.5
8	105,481	2488.6	− 2586	−97.4	× 67 / 362	−18
Sum, rounded to a whole point						−90

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	97,986	2382.1	− 2436	−53.9	× 58 / 447	−7
4	97,987	2428.5	− 2485	−56.5	× 66 / 447	−8.3
5	97,990	2428.2	− 2528	−99.8	× 61 / 447	−13.6
6	97,991	2420.8	− 2552	−131.2	× 85 / 447	−24.9
7	97,993	2470.1	− 2567	−96.9	× 99 / 447	−21.5
8	97,996	2482.0	− 2586	−104	× 78 / 447	−18.1
Sum, rounded to a whole point						−94

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	100,850	2380.6	− 2436	−55.4	× 60 / 473	−7
4	100,852	2406.0	− 2485	−79	× 62 / 473	−10.4
5	100,855	2440.3	− 2528	−87.7	× 65 / 473	−12.1
6	100,857	2447.9	− 2552	−104.1	× 99 / 473	−21.8
7	100,859	2460.9	− 2567	−106.1	× 84 / 473	−18.8
8	100,860	2509.2	− 2586	−76.8	× 103 / 473	−16.7
Sum, rounded to a whole point						−87

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	101,004	2398.1	− 2436	−37.9	× 63 / 451	−5.3
4	101,005	2396.1	− 2485	−88.9	× 53 / 451	−10.4
5	101,008	2445.8	− 2528	−82.2	× 68 / 451	−12.4
6	101,009	2454.3	− 2552	−97.7	× 82 / 451	−17.8
7	101,012	2451.6	− 2567	−115.4	× 98 / 451	−25.1
8	101,013	2499.2	− 2586	−86.8	× 87 / 451	−16.7
Sum, rounded to a whole point						−88

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	101,651	2395.0	− 2436	−41	× 69 / 459	−6.2
4	101,652	2423.1	− 2485	−61.9	× 65 / 459	−8.8
5	101,653	2460.4	− 2528	−67.6	× 58 / 459	−8.5
6	101,654	2428.5	− 2552	−123.5	× 73 / 459	−19.6
7	101,655	2456.8	− 2567	−110.2	× 103 / 459	−24.7
8	101,656	2485.7	− 2586	−100.3	× 91 / 459	−19.9
Sum, rounded to a whole point						−88

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	101,924	2395.0	− 2436	−41	× 59 / 355	−6.8
4	101,925	2401.2	− 2485	−83.8	× 64 / 355	−15.1
5	101,926	2442.0	− 2528	−86	× 61 / 355	−14.8
6	101,927	2413.8	− 2552	−138.2	× 53 / 355	−20.6
7	101,928	2445.9	− 2567	−121.1	× 65 / 355	−22.2
8	101,929	2441.0	− 2586	−145	× 53 / 355	−21.6
Sum, rounded to a whole point						−101

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	101,744	2376.3	− 2436	−59.7	× 66 / 372	−10.6
4	101,745	2431.9	− 2485	−53.1	× 62 / 372	−8.9
5	101,746	2443.7	− 2528	−84.3	× 71 / 372	−16.1
6	101,747	2433.0	− 2552	−119	× 56 / 372	−17.9
7	101,748	2432.7	− 2567	−134.3	× 56 / 372	−20.2
8	101,749	2441.9	− 2586	−144.1	× 61 / 372	−23.6
Sum, rounded to a whole point						−97

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	101,631	2389.7	− 2436	−46.3	× 60 / 376	−7.4
4	101,632	2425.1	− 2485	−59.9	× 66 / 376	−10.5
5	101,633	2466.5	− 2528	−61.5	× 66 / 376	−10.8
6	101,634	2419.6	− 2552	−132.4	× 71 / 376	−25
7	101,635	2468.5	− 2567	−98.5	× 56 / 376	−14.7
8	101,636	2449.5	− 2586	−136.5	× 57 / 376	−20.7
Sum, rounded to a whole point						−89

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	101,297	2399.2	− 2436	−36.8	× 65 / 377	−6.3
4	101,298	2430.0	− 2485	−55	× 57 / 377	−8.3
5	101,299	2453.1	− 2528	−74.9	× 67 / 377	−13.3
6	101,300	2450.4	− 2552	−101.6	× 65 / 377	−17.5
7	101,301	2466.3	− 2567	−100.7	× 71 / 377	−19
8	101,302	2465.5	− 2586	−120.5	× 52 / 377	−16.6
Sum, rounded to a whole point						−81

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −90, −94, −87, −88, −88, −101, −97, −89, −81 → −90.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 4 · 2016→2017: 7 · 2017→2018: 1 · 2018→2019: 0 · 2019→2022: 13 · 2022→2023: 4 · 2023→2024: 8 · 2024→2025: 8 → average 5.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 5.6 × 2.66 = 14.9. Upper limit −75.7, lower limit −105.5.

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.