Lakeside 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	17,223	2385.8	− 2436	−50.2	× 139 / 873	−8
4	17,226	2448.9	− 2485	−36.1	× 172 / 873	−7.1
5	17,227	2438.4	− 2528	−89.6	× 142 / 873	−14.6
6	17,230	2466.1	− 2552	−85.9	× 147 / 873	−14.5
7	17,231	2498.5	− 2567	−68.5	× 132 / 873	−10.4
8	17,234	2504.5	− 2586	−81.5	× 141 / 873	−13.2
Sum, rounded to a whole point						−68

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,241	2405.6	− 2436	−30.4	× 137 / 891	−4.7
4	16,243	2435.3	− 2485	−49.7	× 148 / 891	−8.3
5	16,244	2461.7	− 2528	−66.3	× 163 / 891	−12.1
6	16,247	2464.5	− 2552	−87.5	× 147 / 891	−14.4
7	16,248	2478.4	− 2567	−88.6	× 162 / 891	−16.1
8	16,251	2512.1	− 2586	−73.9	× 134 / 891	−11.1
Sum, rounded to a whole point						−67

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,550	2404.7	− 2436	−31.3	× 138 / 918	−4.7
4	16,552	2454.9	− 2485	−30.1	× 137 / 918	−4.5
5	16,554	2454.7	− 2528	−73.3	× 161 / 918	−12.9
6	16,555	2489.8	− 2552	−62.2	× 158 / 918	−10.7
7	16,558	2485.8	− 2567	−81.2	× 167 / 918	−14.8
8	16,560	2509.9	− 2586	−76.1	× 157 / 918	−13
Sum, rounded to a whole point						−61

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,567	2410.1	− 2436	−25.9	× 144 / 909	−4.1
4	16,569	2457.1	− 2485	−27.9	× 148 / 909	−4.5
5	16,571	2480.8	− 2528	−47.2	× 145 / 909	−7.5
6	16,573	2483.4	− 2552	−68.6	× 155 / 909	−11.7
7	16,575	2509.1	− 2567	−57.9	× 151 / 909	−9.6
8	16,577	2510.6	− 2586	−75.4	× 166 / 909	−13.8
Sum, rounded to a whole point						−51

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,701	2420.3	− 2436	−15.7	× 148 / 921	−2.5
4	16,702	2462.3	− 2485	−22.7	× 149 / 921	−3.7
5	16,703	2476.9	− 2528	−51.1	× 159 / 921	−8.8
6	16,704	2505.3	− 2552	−46.7	× 135 / 921	−6.8
7	16,705	2490.4	− 2567	−76.6	× 174 / 921	−14.5
8	16,706	2525.0	− 2586	−61	× 156 / 921	−10.3
Sum, rounded to a whole point						−47

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,297	2361.7	− 2436	−74.3	× 156 / 875	−13.2
4	16,298	2424.3	− 2485	−60.7	× 160 / 875	−11.1
5	16,299	2436.8	− 2528	−91.2	× 144 / 875	−15
6	16,300	2466.7	− 2552	−85.3	× 138 / 875	−13.5
7	16,301	2475.2	− 2567	−91.8	× 150 / 875	−15.7
8	16,302	2494.1	− 2586	−91.9	× 127 / 875	−13.3
Sum, rounded to a whole point						−82

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,739	2374.7	− 2436	−61.3	× 156 / 982	−9.7
4	16,740	2428.3	− 2485	−56.7	× 165 / 982	−9.5
5	16,741	2452.7	− 2528	−75.3	× 170 / 982	−13
6	16,742	2455.1	− 2552	−96.9	× 149 / 982	−14.7
7	16,743	2462.1	− 2567	−104.9	× 158 / 982	−16.9
8	16,744	2482.2	− 2586	−103.8	× 184 / 982	−19.4
Sum, rounded to a whole point						−83

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,681	2370.1	− 2436	−65.9	× 178 / 1022	−11.5
4	16,682	2448.8	− 2485	−36.2	× 155 / 1022	−5.5
5	16,683	2437.7	− 2528	−90.3	× 176 / 1022	−15.6
6	16,684	2453.5	− 2552	−98.5	× 182 / 1022	−17.5
7	16,685	2440.8	− 2567	−126.2	× 150 / 1022	−18.5
8	16,686	2475.7	− 2586	−110.3	× 181 / 1022	−19.5
Sum, rounded to a whole point						−88

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,634	2372.8	− 2436	−63.2	× 177 / 1040	−10.8
4	16,635	2420.4	− 2485	−64.6	× 187 / 1040	−11.6
5	16,636	2437.3	− 2528	−90.7	× 171 / 1040	−14.9
6	16,637	2422.7	− 2552	−129.3	× 174 / 1040	−21.6
7	16,638	2473.0	− 2567	−94	× 183 / 1040	−16.5
8	16,639	2493.5	− 2586	−92.5	× 148 / 1040	−13.2
Sum, rounded to a whole point						−89

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,625	2402.5	− 2436	−33.5	× 184 / 1082	−5.7
4	16,626	2422.7	− 2485	−62.3	× 189 / 1082	−10.9
5	16,627	2423.1	− 2528	−104.9	× 190 / 1082	−18.4
6	16,628	2451.0	− 2552	−101	× 168 / 1082	−15.7
7	16,629	2440.3	− 2567	−126.7	× 180 / 1082	−21.1
8	16,630	2500.6	− 2586	−85.4	× 171 / 1082	−13.5
Sum, rounded to a whole point						−85

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,638	2401.1	− 2436	−34.9	× 161 / 1082	−5.2
4	16,639	2417.7	− 2485	−67.3	× 187 / 1082	−11.6
5	16,640	2421.6	− 2528	−106.4	× 195 / 1082	−19.2
6	16,641	2449.4	− 2552	−102.6	× 194 / 1082	−18.4
7	16,642	2458.9	− 2567	−108.1	× 176 / 1082	−17.6
8	16,643	2485.4	− 2586	−100.6	× 169 / 1082	−15.7
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. −68, −67, −61, −51, −47, −82, −83, −88, −89, −85, −88 → −73.5
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 1 · 2016→2017: 6 · 2017→2018: 10 · 2018→2019: 4 · 2019→2021: 35 · 2021→2022: 1 · 2022→2023: 5 · 2023→2024: 1 · 2024→2025: 4 · 2025→2026: 3 → average 7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 7 × 2.66 = 18.6. Upper limit −54.9, lower limit −92.1.

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.

Lakeside Union