Crestline Elementary: english

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	64,611	2369.6	− 2432	−62.4	× 65 / 239	−17
4	64,612	2390.3	− 2473	−82.7	× 66 / 239	−22.8
5	64,615	2422.3	− 2502	−79.7	× 56 / 239	−18.7
6	64,616	2491.0	− 2531	−40	× 52 / 239	−8.7
Sum, rounded to a whole point						−67

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,929	2343.6	− 2432	−88.4	× 76 / 258	−26
4	59,932	2377.5	− 2473	−95.5	× 58 / 258	−21.5
5	59,933	2394.5	− 2502	−107.5	× 67 / 258	−27.9
6	59,936	2461.3	− 2531	−69.7	× 57 / 258	−15.4
Sum, rounded to a whole point						−91

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	61,660	2329.6	− 2432	−102.4	× 83 / 285	−29.8
4	61,662	2360.4	− 2473	−112.6	× 83 / 285	−32.8
5	61,663	2431.0	− 2502	−71	× 54 / 285	−13.5
6	61,666	2432.5	− 2531	−98.5	× 65 / 285	−22.5
Sum, rounded to a whole point						−99

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	61,752	2342.1	− 2432	−89.9	× 87 / 281	−27.8
4	61,754	2392.5	− 2473	−80.5	× 68 / 281	−19.5
5	61,756	2392.0	− 2502	−110	× 71 / 281	−27.8
6	61,758	2436.9	− 2531	−94.1	× 55 / 281	−18.4
Sum, rounded to a whole point						−94

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,016	2325.4	− 2432	−106.6	× 83 / 289	−30.6
4	62,017	2357.8	− 2473	−115.2	× 83 / 289	−33.1
5	62,018	2392.3	− 2502	−109.7	× 58 / 289	−22
6	62,019	2429.3	− 2531	−101.7	× 65 / 289	−22.9
Sum, rounded to a whole point						−109

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,637	2322.7	− 2432	−109.3	× 34 / 114	−32.6
4	60,638	2328.2	− 2473	−144.8	× 38 / 114	−48.3
5	60,639	2352.4	− 2502	−149.6	× 19 / 114	−24.9
6	60,640	2431.7	− 2531	−99.3	× 23 / 114	−20
Sum, rounded to a whole point						−126

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,105	2293.2	− 2432	−138.8	× 68 / 229	−41.2
4	62,106	2340.8	− 2473	−132.2	× 63 / 229	−36.4
5	62,107	2350.7	− 2502	−151.3	× 48 / 229	−31.7
6	62,108	2416.4	− 2531	−114.6	× 50 / 229	−25
Sum, rounded to a whole point						−134

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,043	2306.1	− 2432	−125.9	× 76 / 236	−40.5
4	62,044	2337.9	− 2473	−135.1	× 62 / 236	−35.5
5	62,045	2405.1	− 2502	−96.9	× 50 / 236	−20.5
6	62,046	2418.7	− 2531	−112.3	× 48 / 236	−22.8
Sum, rounded to a whole point						−119

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,000	2306.1	− 2432	−125.9	× 70 / 198	−44.5
4	62,001	2332.5	− 2473	−140.5	× 74 / 198	−52.5
5	62,002	2371.3	− 2502	−130.7	× 54 / 198	−35.6
Sum, rounded to a whole point						−133

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	61,767	2314.9	− 2432	−117.1	× 66 / 129	−59.9
4	61,768	2347.8	− 2473	−125.2	× 63 / 129	−61.1
Sum, rounded to a whole point						−121

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −67, −91, −99, −94, −109, −126, −134, −119, −133, −121 → −109.3
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 24 · 2016→2017: 8 · 2017→2018: 5 · 2018→2019: 15 · 2019→2021: 17 · 2021→2022: 8 · 2022→2023: 15 · 2023→2024: 14 · 2024→2025: 12 → average 13.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 13.1 × 2.66 = 34.8. Upper limit −74.5, lower limit −144.1.

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.