Nettie L. Waite Middle: 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	35,414	2449.7	− 2552	−102.3	× 219 / 701	−32
7	35,415	2462.8	− 2567	−104.2	× 218 / 701	−32.4
8	35,418	2488.5	− 2586	−97.5	× 264 / 701	−36.7
Sum, rounded to a whole point						−101

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	33,081	2445.4	− 2552	−106.6	× 201 / 657	−32.6
7	33,083	2463.3	− 2567	−103.7	× 241 / 657	−38
8	33,085	2472.1	− 2586	−113.9	× 215 / 657	−37.3
Sum, rounded to a whole point						−108

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	33,658	2459.5	− 2552	−92.5	× 197 / 646	−28.2
7	33,660	2479.8	− 2567	−87.2	× 205 / 646	−27.7
8	33,661	2462.9	− 2586	−123.1	× 244 / 646	−46.5
Sum, rounded to a whole point						−102

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	33,684	2447.9	− 2552	−104.1	× 176 / 584	−31.4
7	33,685	2463.1	− 2567	−103.9	× 202 / 584	−35.9
8	33,687	2472.4	− 2586	−113.6	× 206 / 584	−40.1
Sum, rounded to a whole point						−107

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	33,859	2452.2	− 2552	−99.8	× 182 / 561	−32.4
7	33,860	2445.8	− 2567	−121.2	× 171 / 561	−36.9
8	33,861	2474.2	− 2586	−111.8	× 208 / 561	−41.5
Sum, rounded to a whole point						−111

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	33,778	2420.7	− 2552	−131.3	× 196 / 544	−47.3
7	33,779	2433.1	− 2567	−133.9	× 177 / 544	−43.6
8	33,780	2450.3	− 2586	−135.7	× 171 / 544	−42.7
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
6	33,827	2434.4	− 2552	−117.6	× 177 / 552	−37.7
7	33,828	2424.3	− 2567	−142.7	× 197 / 552	−50.9
8	33,829	2457.6	− 2586	−128.4	× 178 / 552	−41.4
Sum, rounded to a whole point						−130

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	33,683	2441.3	− 2552	−110.7	× 149 / 524	−31.5
7	33,684	2450.5	− 2567	−116.5	× 182 / 524	−40.5
8	33,685	2443.5	− 2586	−142.5	× 193 / 524	−52.5
Sum, rounded to a whole point						−124

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	33,544	2454.1	− 2552	−97.9	× 124 / 455	−26.7
7	33,545	2456.5	− 2567	−110.5	× 157 / 455	−38.1
8	33,546	2475.3	− 2586	−110.7	× 174 / 455	−42.3
Sum, rounded to a whole point						−107

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −101, −108, −102, −107, −111, −134, −130, −124, −107 → −113.8
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 7 · 2016→2017: 6 · 2017→2018: 5 · 2018→2019: 4 · 2019→2022: 23 · 2022→2023: 4 · 2023→2024: 6 · 2024→2025: 17 → average 9
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9 × 2.66 = 23.9. Upper limit −89.9, lower limit −137.7.

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.