Las Lomitas Elementary: english

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	83,129	2503.9	− 2432	71.9	× 169 / 914	13.3
4	83,130	2537.6	− 2473	64.6	× 175 / 914	12.4
5	83,133	2577.2	− 2502	75.2	× 163 / 914	13.4
6	83,134	2597.9	− 2531	66.9	× 137 / 914	10
7	83,137	2632.2	− 2552	80.2	× 128 / 914	11.2
8	83,138	2648.3	− 2567	81.3	× 142 / 914	12.6
Sum, rounded to a whole point						73

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	77,089	2524.5	− 2432	92.5	× 155 / 914	15.7
4	77,091	2553.0	− 2473	80	× 173 / 914	15.1
5	77,093	2578.1	− 2502	76.1	× 169 / 914	14.1
6	77,095	2605.3	− 2531	74.3	× 154 / 914	12.5
7	77,096	2624.8	− 2552	72.8	× 136 / 914	10.8
8	77,098	2661.4	− 2567	94.4	× 127 / 914	13.1
Sum, rounded to a whole point						81

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,179	2509.0	− 2432	77	× 147 / 920	12.3
4	79,181	2560.5	− 2473	87.5	× 154 / 920	14.6
5	79,183	2588.2	− 2502	86.2	× 178 / 920	16.7
6	79,185	2605.9	− 2531	74.9	× 153 / 920	12.5
7	79,187	2629.3	− 2552	77.3	× 159 / 920	13.4
8	79,189	2651.2	− 2567	84.2	× 129 / 920	11.8
Sum, rounded to a whole point						81

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,318	2510.0	− 2432	78	× 134 / 899	11.6
4	79,321	2557.4	− 2473	84.4	× 148 / 899	13.9
5	79,322	2601.9	− 2502	99.9	× 155 / 899	17.2
6	79,325	2614.7	− 2531	83.7	× 162 / 899	15.1
7	79,326	2633.8	− 2552	81.8	× 147 / 899	13.4
8	79,329	2640.9	− 2567	73.9	× 153 / 899	12.6
Sum, rounded to a whole point						84

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,844	2514.9	− 2432	82.9	× 138 / 857	13.3
4	79,845	2548.1	− 2473	75.1	× 134 / 857	11.7
5	79,846	2595.1	− 2502	93.1	× 146 / 857	15.9
6	79,847	2617.9	− 2531	86.9	× 135 / 857	13.7
7	79,848	2646.8	− 2552	94.8	× 160 / 857	17.7
8	79,849	2652.1	− 2567	85.1	× 144 / 857	14.3
Sum, rounded to a whole point						87

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	78,293	2505.4	− 2432	73.4	× 99 / 630	11.5
4	78,294	2557.7	− 2473	84.7	× 117 / 630	15.7
5	78,295	2598.4	− 2502	96.4	× 117 / 630	17.9
6	78,296	2614.4	− 2531	83.4	× 107 / 630	14.2
7	78,297	2676.9	− 2552	124.9	× 93 / 630	18.4
8	78,298	2694.0	− 2567	127	× 97 / 630	19.6
Sum, rounded to a whole point						97

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,096	2531.7	− 2432	99.7	× 115 / 671	17.1
4	80,097	2554.5	− 2473	81.5	× 101 / 671	12.3
5	80,098	2608.2	− 2502	106.2	× 124 / 671	19.6
6	80,099	2618.6	− 2531	87.6	× 107 / 671	14
7	80,100	2675.9	− 2552	123.9	× 109 / 671	20.1
8	80,101	2671.7	− 2567	104.7	× 115 / 671	17.9
Sum, rounded to a whole point						101

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,068	2509.1	− 2432	77.1	× 122 / 694	13.6
4	80,069	2561.9	− 2473	88.9	× 123 / 694	15.8
5	80,070	2594.6	− 2502	92.6	× 111 / 694	14.8
6	80,071	2606.6	− 2531	75.6	× 120 / 694	13.1
7	80,072	2659.5	− 2552	107.5	× 108 / 694	16.7
8	80,073	2668.1	− 2567	101.1	× 110 / 694	16
Sum, rounded to a whole point						90

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,092	2494.9	− 2432	62.9	× 136 / 696	12.3
4	80,093	2552.5	− 2473	79.5	× 122 / 696	13.9
5	80,094	2607.9	− 2502	105.9	× 118 / 696	18
6	80,095	2626.2	− 2531	95.2	× 101 / 696	13.8
7	80,096	2663.3	− 2552	111.3	× 114 / 696	18.2
8	80,097	2674.0	− 2567	107	× 105 / 696	16.1
Sum, rounded to a whole point						92

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,756	2509.7	− 2432	77.7	× 126 / 706	13.9
4	79,757	2556.4	− 2473	83.4	× 134 / 706	15.8
5	79,758	2597.2	− 2502	95.2	× 123 / 706	16.6
6	79,759	2633.2	− 2531	102.2	× 114 / 706	16.5
7	79,760	2651.3	− 2552	99.3	× 99 / 706	13.9
8	79,761	2665.6	− 2567	98.6	× 110 / 706	15.4
Sum, rounded to a whole point						92

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 73, 81, 81, 84, 87, 97, 101, 90, 92, 92 → 87.8
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 8 · 2016→2017: 0 · 2017→2018: 3 · 2018→2019: 3 · 2019→2021: 10 · 2021→2022: 4 · 2022→2023: 11 · 2023→2024: 2 · 2024→2025: 0 → average 4.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 4.6 × 2.66 = 12.2. Upper limit 100, lower limit 75.6.

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.