Grossmont Secondary: science

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.

Measured against each grade's bar

California tests science only in grades 5 and 8 and once in high school, so a school shows one or two grades here. Each grade's science test has its own scale, so each grade is measured against its own bar.

8th The average 8th grader scores 22 points under the grade 8 bar. 393 vs. 415.
10th The average 10th grader scores 17 points under the grade 10 bar. 598 vs. 615.
11th The average 11th grader scores 24 points under the grade 11 bar. 591 vs. 615.
12th The average 12th grader scores 17 points under the grade 12 bar. 598 vs. 615.

2025 results. "Meets standard" is the state's mark for being on track for that grade.

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.

2019 from cast_ca2019_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
8	20,872	390.4	− 415	−24.6	× 21 / 122	−4.2
10	20,873	599.2	− 615	−15.8	× 27 / 122	−3.5
11	20,874	604.2	− 615	−10.8	× 28 / 122	−2.5
12	20,875	592.7	− 615	−22.3	× 46 / 122	−8.4
Sum, rounded to a whole point						−19

2022 from cast_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
8	25,994	397.3	− 415	−17.7	× 23 / 74	−5.5
10	25,995	604.3	− 615	−10.7	× 16 / 74	−2.3
12	25,997	601.8	− 615	−13.2	× 35 / 74	−6.2
Sum, rounded to a whole point						−14

2023 from cast_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
8	25,979	392.3	− 415	−22.7	× 15 / 53	−6.4
12	25,982	597.3	− 615	−17.7	× 38 / 53	−12.7
Sum, rounded to a whole point						−19

2024 from cast_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
8	26,049	395.0	− 415	−20	× 28 / 104	−5.4
10	26,050	598.8	− 615	−16.2	× 34 / 104	−5.3
11	26,051	599.5	− 615	−15.5	× 13 / 104	−1.9
12	26,052	598.2	− 615	−16.8	× 29 / 104	−4.7
Sum, rounded to a whole point						−17

2025 from cast_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
8	26,007	393.4	− 415	−21.6	× 24 / 86	−6
10	26,008	598.4	− 615	−16.6	× 34 / 86	−6.6
11	26,009	590.9	− 615	−24.1	× 11 / 86	−3.1
12	26,010	597.9	− 615	−17.1	× 17 / 86	−3.4
Sum, rounded to a whole point						−19

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −19, −14, −19, −17, −19 → −17.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2019→2022: 5 · 2022→2023: 5 · 2023→2024: 2 · 2024→2025: 2 → average 3.5
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 3.5 × 2.66 = 9.3. Upper limit −8.3, lower limit −26.9.

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 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25.