Marina del Rey 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.

Measured against the grade bars

The state's math test uses one scale for every grade, so a score means the same thing in grade 3 as in grade 8.

6th The average 6th grader scores 35 points under the grade 5 bar. 2493 vs. 2528. The 6th-grade bar is 2552.
7th The average 7th grader scores 14 points under the grade 4 bar. 2471 vs. 2485. The 7th-grade bar is 2567.
8th The average 8th grader scores 18 points under the grade 4 bar. 2468 vs. 2485. The 8th-grade bar is 2586.

2026 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.

2015 from sb_ca2015_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	32,988	2436.4	− 2552	−115.6	× 170 / 630	−31.2
7	32,989	2464.3	− 2567	−102.7	× 223 / 630	−36.4
8	32,991	2476.2	− 2586	−109.8	× 237 / 630	−41.3
Sum, rounded to a whole point						−109

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	31,202	2460.5	− 2552	−91.5	× 209 / 624	−30.6
7	31,203	2470.1	− 2567	−96.9	× 191 / 624	−29.7
8	31,206	2496.0	− 2586	−90	× 224 / 624	−32.3
Sum, rounded to a whole point						−93

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	31,763	2458.9	− 2552	−93.1	× 171 / 543	−29.3
7	31,765	2469.6	− 2567	−97.4	× 193 / 543	−34.6
8	31,767	2477.1	− 2586	−108.9	× 179 / 543	−35.9
Sum, rounded to a whole point						−100

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	31,800	2461.8	− 2552	−90.2	× 196 / 563	−31.4
7	31,801	2466.7	− 2567	−100.3	× 172 / 563	−30.6
8	31,803	2480.9	− 2586	−105.1	× 195 / 563	−36.4
Sum, rounded to a whole point						−98

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	31,977	2449.1	− 2552	−102.9	× 140 / 514	−28
7	31,978	2458.2	− 2567	−108.8	× 197 / 514	−41.7
8	31,979	2463.8	− 2586	−122.2	× 177 / 514	−42.1
Sum, rounded to a whole point						−112

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	32,004	2450.5	− 2552	−101.5	× 108 / 357	−30.7
7	32,005	2434.4	− 2567	−132.6	× 109 / 357	−40.5
8	32,006	2458.7	− 2586	−127.3	× 140 / 357	−49.9
Sum, rounded to a whole point						−121

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	32,061	2427.6	− 2552	−124.4	× 123 / 381	−40.2
7	32,062	2442.1	− 2567	−124.9	× 113 / 381	−37
8	32,063	2424.7	− 2586	−161.3	× 145 / 381	−61.4
Sum, rounded to a whole point						−139

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	31,927	2457.7	− 2552	−94.3	× 102 / 324	−29.7
7	31,928	2448.4	− 2567	−118.6	× 118 / 324	−43.2
8	31,929	2440.8	− 2586	−145.2	× 104 / 324	−46.6
Sum, rounded to a whole point						−119

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	31,786	2489.7	− 2552	−62.3	× 62 / 259	−14.9
7	31,787	2473.2	− 2567	−93.8	× 93 / 259	−33.7
8	31,788	2483.2	− 2586	−102.8	× 104 / 259	−41.3
Sum, rounded to a whole point						−90

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	31,774	2493.1	− 2552	−58.9	× 110 / 260	−24.9
7	31,775	2471.4	− 2567	−95.6	× 63 / 260	−23.2
8	31,776	2467.5	− 2586	−118.5	× 87 / 260	−39.7
Sum, rounded to a whole point						−88

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −109, −93, −100, −98, −112, −121, −139, −119, −90, −88 → −106.9
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: 7 · 2017→2018: 2 · 2018→2019: 14 · 2019→2022: 9 · 2022→2023: 18 · 2023→2024: 20 · 2024→2025: 29 · 2025→2026: 2 → average 13
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 13 × 2.66 = 34.6. Upper limit −72.3, lower limit −141.5.

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.