Imperial Beach Charter: 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.

All students

3rd The average 3rd grader scores 26 points under the grade 3 bar. 2410 vs. 2436.
4th The average 4th grader scores 13 points under the grade 3 bar. 2423 vs. 2436. The 4th-grade bar is 2485.
5th The average 5th grader scores just under the grade 4 bar. 2483 vs. 2485. The 5th-grade bar is 2528.
6th The average 6th grader scores 21 points under the grade 4 bar. 2464 vs. 2485. The 6th-grade bar is 2552.
7th The average 7th grader scores 23 points under the grade 5 bar. 2505 vs. 2528. The 7th-grade bar is 2567.
8th The average 8th grader scores 24 points under the grade 4 bar. 2462 vs. 2485. The 8th-grade bar is 2586.

Students fluent in English

Math with English out of the way. Includes students who have only ever spoken English.

Grade bars 3rd 48 students 19 points under the grade 3 bar. 4th 52 students Just under the grade 3 bar. 5th 59 students 20 points under the grade 5 bar. 6th 69 students Just under the grade 4 bar. 7th 86 students Just under the grade 5 bar. 8th 91 students Just under the grade 4 bar.

English learners

Students leave this group as they become fluent, so its average stays low even where they learn well.

Grade bars 3rd 14 students 49 points under the grade 3 bar. 4th 15 students 53 points under the grade 3 bar. 5th 18 students 33 points under the grade 3 bar. 6th 21 students 20 points under the grade 3 bar. 7th 23 students Just under the grade 3 bar. 8th 20 students 46 points under the grade 3 bar.

the group's average that grade's own bar the distance between

2026 results. "Meets standard" is the state's mark for being on track for that grade. The state leaves out any group of ten students or fewer, so a grade may be missing from the charts.

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	75,887	2397.2	− 2436	−38.8	× 100 / 588	−6.6
4	75,889	2438.3	− 2485	−46.7	× 120 / 588	−9.5
5	75,891	2473.6	− 2528	−54.4	× 124 / 588	−11.5
6	75,893	2493.8	− 2552	−58.2	× 123 / 588	−12.2
7	75,895	2569.6	− 2567	2.6	× 65 / 588	0.3
8	75,897	2578.5	− 2586	−7.5	× 56 / 588	−0.7
Sum, rounded to a whole point						−40

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	70,379	2441.4	− 2436	5.4	× 107 / 592	1
4	70,381	2449.0	− 2485	−36	× 112 / 592	−6.8
5	70,383	2471.8	− 2528	−56.2	× 126 / 592	−12
6	70,385	2499.7	− 2552	−52.3	× 125 / 592	−11
7	70,386	2604.3	− 2567	37.3	× 60 / 592	3.8
8	70,389	2596.5	− 2586	10.5	× 62 / 592	1.1
Sum, rounded to a whole point						−24

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	72,242	2451.9	− 2436	15.9	× 88 / 555	2.5
4	72,243	2454.6	− 2485	−30.4	× 101 / 555	−5.5
5	72,246	2464.7	− 2528	−63.3	× 108 / 555	−12.3
6	72,248	2486.9	− 2552	−65.1	× 140 / 555	−16.4
7	72,250	2573.9	− 2567	6.9	× 61 / 555	0.8
8	72,252	2597.3	− 2586	11.3	× 57 / 555	1.2
Sum, rounded to a whole point						−30

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	72,380	2447.5	− 2436	11.5	× 83 / 567	1.7
4	72,382	2470.4	− 2485	−14.6	× 89 / 567	−2.3
5	72,384	2493.3	− 2528	−34.7	× 96 / 567	−5.9
6	72,386	2494.5	− 2552	−57.5	× 112 / 567	−11.4
7	72,388	2540.6	− 2567	−26.4	× 127 / 567	−5.9
8	72,390	2573.0	− 2586	−13	× 60 / 567	−1.4
Sum, rounded to a whole point						−25

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	72,883	2426.7	− 2436	−9.3	× 76 / 600	−1.2
4	72,884	2468.6	− 2485	−16.4	× 91 / 600	−2.5
5	72,885	2483.0	− 2528	−45	× 89 / 600	−6.7
6	72,886	2518.9	− 2552	−33.1	× 94 / 600	−5.2
7	72,887	2551.6	− 2567	−15.4	× 126 / 600	−3.2
8	72,888	2554.5	− 2586	−31.5	× 124 / 600	−6.5
Sum, rounded to a whole point						−25

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	71,370	2365.6	− 2436	−70.4	× 74 / 490	−10.6
4	71,371	2418.5	− 2485	−66.5	× 72 / 490	−9.8
5	71,372	2420.0	− 2528	−108	× 65 / 490	−14.3
6	71,373	2456.5	− 2552	−95.5	× 71 / 490	−13.8
7	71,374	2504.6	− 2567	−62.4	× 97 / 490	−12.4
8	71,375	2499.1	− 2586	−86.9	× 111 / 490	−19.7
Sum, rounded to a whole point						−81

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	72,973	2391.1	− 2436	−44.9	× 70 / 537	−5.9
4	72,974	2436.2	− 2485	−48.8	× 85 / 537	−7.7
5	72,975	2451.1	− 2528	−76.9	× 79 / 537	−11.3
6	72,976	2455.3	− 2552	−96.7	× 87 / 537	−15.7
7	72,977	2489.0	− 2567	−78	× 115 / 537	−16.7
8	72,978	2492.6	− 2586	−93.4	× 101 / 537	−17.6
Sum, rounded to a whole point						−75

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	72,967	2405.7	− 2436	−30.3	× 75 / 533	−4.3
4	72,968	2419.6	− 2485	−65.4	× 76 / 533	−9.3
5	72,969	2455.1	− 2528	−72.9	× 81 / 533	−11.1
6	72,970	2483.8	− 2552	−68.2	× 76 / 533	−9.7
7	72,971	2487.8	− 2567	−79.2	× 111 / 533	−16.5
8	72,972	2488.1	− 2586	−97.9	× 114 / 533	−20.9
Sum, rounded to a whole point						−72

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	72,957	2408.2	− 2436	−27.8	× 76 / 527	−4
4	72,958	2426.6	− 2485	−58.4	× 75 / 527	−8.3
5	72,959	2470.0	− 2528	−58	× 75 / 527	−8.3
6	72,960	2496.4	− 2552	−55.6	× 80 / 527	−8.4
7	72,961	2482.7	− 2567	−84.3	× 115 / 527	−18.4
8	72,962	2456.8	− 2586	−129.2	× 106 / 527	−26
Sum, rounded to a whole point						−73

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	72,653	2399.6	− 2436	−36.4	× 56 / 508	−4
4	72,654	2452.0	− 2485	−33	× 78 / 508	−5.1
5	72,655	2457.9	− 2528	−70.1	× 77 / 508	−10.6
6	72,656	2476.5	− 2552	−75.5	× 80 / 508	−11.9
7	72,657	2480.7	− 2567	−86.3	× 119 / 508	−20.2
8	72,658	2467.1	− 2586	−118.9	× 98 / 508	−22.9
Sum, rounded to a whole point						−75

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	72,679	2410.1	− 2436	−25.9	× 62 / 516	−3.1
4	72,680	2422.6	− 2485	−62.4	× 67 / 516	−8.1
5	72,681	2483.2	− 2528	−44.8	× 77 / 516	−6.7
6	72,682	2463.8	− 2552	−88.2	× 90 / 516	−15.4
7	72,683	2505.0	− 2567	−62	× 109 / 516	−13.1
8	72,684	2461.5	− 2586	−124.5	× 111 / 516	−26.8
Sum, rounded to a whole point						−73

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −40, −24, −30, −25, −25, −81, −75, −72, −73, −75, −73 → −53.9
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: 6 · 2017→2018: 5 · 2018→2019: 0 · 2019→2021: 56 · 2021→2022: 6 · 2022→2023: 3 · 2023→2024: 1 · 2024→2025: 2 · 2025→2026: 2 → average 9.7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.7 × 2.66 = 25.8. Upper limit −28.1, lower limit −79.7.

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.