Elmhurst Community Prep: 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
6	2,364	2408.8	− 2552	−143.2	× 117 / 365	−45.9
7	2,367	2427.2	− 2567	−139.8	× 123 / 365	−47.1
8	2,368	2430.8	− 2586	−155.2	× 125 / 365	−53.2
Sum, rounded to a whole point						−146

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	2,046	2415.8	− 2552	−136.2	× 129 / 368	−47.7
7	2,049	2444.7	− 2567	−122.3	× 116 / 368	−38.6
8	2,051	2456.6	− 2586	−129.4	× 123 / 368	−43.3
Sum, rounded to a whole point						−130

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	2,104	2414.7	− 2552	−137.3	× 120 / 357	−46.2
7	2,107	2434.9	− 2567	−132.1	× 123 / 357	−45.5
8	2,108	2466.1	− 2586	−119.9	× 114 / 357	−38.3
Sum, rounded to a whole point						−130

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	2,108	2401.4	− 2552	−150.6	× 109 / 360	−45.6
7	2,110	2447.3	− 2567	−119.7	× 127 / 360	−42.2
8	2,112	2467.9	− 2586	−118.1	× 124 / 360	−40.7
Sum, rounded to a whole point						−129

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	2,118	2428.6	− 2552	−123.4	× 125 / 366	−42.1
7	2,119	2451.8	− 2567	−115.2	× 116 / 366	−36.5
8	2,120	2451.4	− 2586	−134.6	× 125 / 366	−46
Sum, rounded to a whole point						−125

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	2,092	2404.8	− 2552	−147.2	× 235 / 670	−51.6
7	2,093	2439.5	− 2567	−127.5	× 222 / 670	−42.2
8	2,094	2425.9	− 2586	−160.1	× 213 / 670	−50.9
Sum, rounded to a whole point						−145

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	2,044	2411.6	− 2552	−140.4	× 237 / 713	−46.7
7	2,045	2421.7	− 2567	−145.3	× 245 / 713	−49.9
8	2,046	2420.4	− 2586	−165.6	× 231 / 713	−53.7
Sum, rounded to a whole point						−150

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	2,012	2391.7	− 2552	−160.3	× 238 / 717	−53.2
7	2,013	2427.7	− 2567	−139.3	× 238 / 717	−46.2
8	2,014	2429.4	− 2586	−156.6	× 241 / 717	−52.6
Sum, rounded to a whole point						−152

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	1,986	2388.9	− 2552	−163.1	× 235 / 709	−54.1
7	1,987	2437.8	− 2567	−129.2	× 231 / 709	−42.1
8	1,988	2455.3	− 2586	−130.7	× 243 / 709	−44.8
Sum, rounded to a whole point						−141

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −146, −130, −130, −129, −125, −145, −150, −152, −141 → −138.7
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 16 · 2016→2017: 0 · 2017→2018: 1 · 2018→2019: 4 · 2019→2022: 20 · 2022→2023: 5 · 2023→2024: 2 · 2024→2025: 11 → average 7.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 7.4 × 2.66 = 19.7. Upper limit −119, lower limit −158.4.

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.