Bellevue Union: math

The shaded band is this district'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	93,951	2392.3	− 2436	−43.7	× 240 / 995	−10.5
4	93,952	2410.6	− 2485	−74.4	× 267 / 995	−20
5	93,955	2444.3	− 2528	−83.7	× 261 / 995	−22
6	93,956	2486.3	− 2552	−65.7	× 227 / 995	−15
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	87,218	2403.7	− 2436	−32.3	× 211 / 975	−7
4	87,220	2423.0	− 2485	−62	× 247 / 975	−15.7
5	87,222	2447.0	− 2528	−81	× 265 / 975	−22
6	87,223	2505.8	− 2552	−46.2	× 252 / 975	−11.9
Sum, rounded to a whole point						−57

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,689	2411.2	− 2436	−24.8	× 259 / 962	−6.7
4	89,690	2428.1	− 2485	−56.9	× 203 / 962	−12
5	89,692	2460.3	− 2528	−67.7	× 250 / 962	−17.6
6	89,695	2494.8	− 2552	−57.2	× 250 / 962	−14.9
Sum, rounded to a whole point						−51

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,898	2397.9	− 2436	−38.1	× 243 / 1029	−9
4	89,899	2428.1	− 2485	−56.9	× 243 / 1029	−13.4
5	89,902	2445.7	− 2528	−82.3	× 197 / 1029	−15.8
6	89,903	2501.3	− 2552	−50.7	× 251 / 1029	−12.4
7	89,906	2512.6	− 2567	−54.4	× 48 / 1029	−2.5
8	89,907	2515.1	− 2586	−70.9	× 31 / 1029	−2.1
11	89,910	2510.2	− 2628	−117.8	× 16 / 1029	−1.8
Sum, rounded to a whole point						−57

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,536	2400.2	− 2436	−35.8	× 229 / 888	−9.2
4	90,537	2416.8	− 2485	−68.2	× 229 / 888	−17.6
5	90,538	2462.0	− 2528	−66	× 239 / 888	−17.8
6	90,539	2508.7	− 2552	−43.3	× 191 / 888	−9.3
Sum, rounded to a whole point						−54

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,764	2363.7	− 2436	−72.3	× 196 / 816	−17.4
4	90,765	2373.7	− 2485	−111.3	× 199 / 816	−27.1
5	90,766	2419.4	− 2528	−108.6	× 211 / 816	−28.1
6	90,767	2449.2	− 2552	−102.8	× 210 / 816	−26.5
Sum, rounded to a whole point						−99

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,664	2360.3	− 2436	−75.7	× 204 / 816	−18.9
4	90,665	2418.2	− 2485	−66.8	× 192 / 816	−15.7
5	90,666	2429.6	− 2528	−98.4	× 210 / 816	−25.3
6	90,667	2457.0	− 2552	−95	× 210 / 816	−24.4
Sum, rounded to a whole point						−84

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,607	2377.3	− 2436	−58.7	× 213 / 832	−15
4	90,608	2398.2	− 2485	−86.8	× 207 / 832	−21.6
5	90,609	2446.9	− 2528	−81.1	× 200 / 832	−19.5
6	90,610	2458.6	− 2552	−93.4	× 212 / 832	−23.8
Sum, rounded to a whole point						−80

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,297	2381.3	− 2436	−54.7	× 212 / 843	−13.8
4	90,298	2405.8	− 2485	−79.2	× 214 / 843	−20.1
5	90,299	2416.2	− 2528	−111.8	× 205 / 843	−27.2
6	90,300	2465.5	− 2552	−86.5	× 212 / 843	−21.8
Sum, rounded to a whole point						−83

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,958	2378.5	− 2436	−57.5	× 232 / 853	−15.6
4	89,959	2410.9	− 2485	−74.1	× 220 / 853	−19.1
5	89,960	2443.5	− 2528	−84.5	× 202 / 853	−20
6	89,961	2443.9	− 2552	−108.1	× 199 / 853	−25.2
Sum, rounded to a whole point						−80

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −67, −57, −51, −57, −54, −99, −84, −80, −83, −80 → −71.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 10 · 2016→2017: 6 · 2017→2018: 6 · 2018→2019: 3 · 2019→2022: 45 · 2022→2023: 15 · 2023→2024: 4 · 2024→2025: 3 · 2025→2026: 3 → average 10.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10.6 × 2.66 = 28.2. Upper limit −43, lower limit −99.4.

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 — for a district, the total across its schools. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.

Bellevue Union