Empire Springs Charter: 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	66,158	2398.8	− 2436	−37.2	× 66 / 427	−5.7
4	66,161	2441.5	− 2485	−43.5	× 61 / 427	−6.2
5	66,162	2462.8	− 2528	−65.2	× 75 / 427	−11.5
6	66,164	2496.1	− 2552	−55.9	× 72 / 427	−9.4
7	66,166	2522.5	− 2567	−44.5	× 70 / 427	−7.3
8	66,169	2530.6	− 2586	−55.4	× 65 / 427	−8.4
11	66,170	2585.8	− 2628	−42.2	× 18 / 427	−1.8
Sum, rounded to a whole point						−50

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	61,352	2409.0	− 2436	−27	× 72 / 482	−4
4	61,354	2446.7	− 2485	−38.3	× 80 / 482	−6.4
5	61,356	2463.8	− 2528	−64.2	× 75 / 482	−10
6	61,357	2503.6	− 2552	−48.4	× 92 / 482	−9.2
7	61,360	2497.9	− 2567	−69.1	× 92 / 482	−13.2
8	61,361	2564.9	− 2586	−21.1	× 47 / 482	−2.1
11	61,363	2543.9	− 2628	−84.1	× 24 / 482	−4.2
Sum, rounded to a whole point						−49

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	63,130	2408.6	− 2436	−27.4	× 94 / 535	−4.8
4	63,131	2431.0	− 2485	−54	× 82 / 535	−8.3
5	63,134	2463.1	− 2528	−64.9	× 81 / 535	−9.8
6	63,135	2489.5	− 2552	−62.5	× 82 / 535	−9.6
7	63,137	2518.2	− 2567	−48.8	× 90 / 535	−8.2
8	63,139	2516.4	− 2586	−69.6	× 75 / 535	−9.8
11	63,142	2524.6	− 2628	−103.4	× 31 / 535	−6
Sum, rounded to a whole point						−56

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	63,212	2398.6	− 2436	−37.4	× 99 / 654	−5.7
4	63,214	2445.9	− 2485	−39.1	× 116 / 654	−6.9
5	63,216	2458.0	− 2528	−70	× 102 / 654	−10.9
6	63,218	2480.8	− 2552	−71.2	× 103 / 654	−11.2
7	63,220	2519.9	− 2567	−47.1	× 100 / 654	−7.2
8	63,222	2507.2	− 2586	−78.8	× 104 / 654	−12.5
11	63,224	2529.5	− 2628	−98.5	× 30 / 654	−4.5
Sum, rounded to a whole point						−59

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	63,486	2395.2	− 2436	−40.8	× 90 / 738	−5
4	63,487	2441.9	− 2485	−43.1	× 98 / 738	−5.7
5	63,488	2452.7	− 2528	−75.3	× 127 / 738	−13
6	63,489	2482.6	− 2552	−69.4	× 123 / 738	−11.6
7	63,490	2495.5	− 2567	−71.5	× 139 / 738	−13.5
8	63,491	2501.4	− 2586	−84.6	× 118 / 738	−13.5
11	63,492	2532.1	− 2628	−95.9	× 43 / 738	−5.6
Sum, rounded to a whole point						−68

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	63,561	2399.1	− 2436	−36.9	× 135 / 823	−6.1
4	63,562	2420.8	− 2485	−64.2	× 118 / 823	−9.2
5	63,563	2458.6	− 2528	−69.4	× 128 / 823	−10.8
6	63,564	2472.9	− 2552	−79.1	× 123 / 823	−11.8
7	63,565	2507.6	− 2567	−59.4	× 130 / 823	−9.4
8	63,566	2499.2	− 2586	−86.8	× 134 / 823	−14.1
11	63,567	2519.7	− 2628	−108.3	× 55 / 823	−7.2
Sum, rounded to a whole point						−69

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	63,504	2395.9	− 2436	−40.1	× 142 / 889	−6.4
4	63,505	2447.7	− 2485	−37.3	× 119 / 889	−5
5	63,506	2454.7	− 2528	−73.3	× 129 / 889	−10.6
6	63,507	2469.6	− 2552	−82.4	× 139 / 889	−12.9
7	63,508	2494.3	− 2567	−72.7	× 155 / 889	−12.7
8	63,509	2506.7	− 2586	−79.3	× 136 / 889	−12.1
11	63,510	2530.4	− 2628	−97.6	× 69 / 889	−7.6
Sum, rounded to a whole point						−67

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	63,476	2388.8	− 2436	−47.2	× 124 / 880	−6.7
4	63,477	2427.8	− 2485	−57.2	× 126 / 880	−8.2
5	63,478	2461.5	− 2528	−66.5	× 123 / 880	−9.3
6	63,479	2473.1	− 2552	−78.9	× 133 / 880	−11.9
7	63,480	2493.2	− 2567	−73.8	× 157 / 880	−13.2
8	63,481	2502.2	− 2586	−83.8	× 143 / 880	−13.6
11	63,482	2537.6	− 2628	−90.4	× 74 / 880	−7.6
Sum, rounded to a whole point						−70

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	63,242	2386.9	− 2436	−49.1	× 141 / 1039	−6.7
4	63,243	2429.4	− 2485	−55.6	× 125 / 1039	−6.7
5	63,244	2446.6	− 2528	−81.4	× 122 / 1039	−9.6
6	63,245	2489.5	− 2552	−62.5	× 174 / 1039	−10.5
7	63,246	2530.7	− 2567	−36.3	× 189 / 1039	−6.6
8	63,247	2525.9	− 2586	−60.1	× 188 / 1039	−10.9
11	63,248	2575.6	− 2628	−52.4	× 100 / 1039	−5
Sum, rounded to a whole point						−56

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −50, −49, −56, −59, −68, −69, −67, −70, −56 → −60.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 1 · 2016→2017: 7 · 2017→2018: 3 · 2018→2019: 9 · 2019→2022: 1 · 2022→2023: 2 · 2023→2024: 3 · 2024→2025: 14 → average 5
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 5 × 2.66 = 13.3. Upper limit −47.1, lower limit −73.7.

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.