Grattan Elementary vs Cobb (William L.) Elementary

Grattan Elementary outpaces Cobb (William L.) Elementary by 0.7 points overall — 9.2 versus 8.5 out of 10 — and the state rank gap is substantial: Grattan Elementary sits at #179 of 9,533 California schools while Cobb (William L.) Elementary ranks #864 of 9,533. Both are KG–05 schools 1.8 miles apart in San Francisco, so for families weighing these options, the differences are meaningful rather than marginal.

On academics, the delta is 1.5 points: Grattan Elementary scores 8.7/10 versus Cobb (William L.) Elementary's 7.2/10. Growth tells a different story — Cobb (William L.) Elementary actually edges ahead with a near-perfect 10.0/10 growth score compared to Grattan Elementary's already-strong 9.5/10. That means students at Cobb (William L.) Elementary are advancing at a faster rate year over year, even if their starting academic baseline is lower. Parents weighing current proficiency against year-over-year momentum will find a genuine trade-off here.

The demographic and equity gap between the two schools is the starkest contrast of all. Grattan Elementary enrolls 384 students with a 15% free and reduced-price lunch rate, signaling a predominantly higher-income population. Cobb (William L.) Elementary serves 137 students with a 66% FRL rate — more than four times higher — making it one of the more economically diverse elementary schools in the city. Student-teacher ratios are close but not identical: Grattan Elementary at 20.2:1 versus Cobb (William L.) Elementary at 19.6:1, a difference unlikely to drive a decision on its own.

Both schools share the same grade span — kindergarten through fifth grade — so program structure is comparable at a structural level. Grattan Elementary's significantly larger enrollment of 384 students versus Cobb's 137 suggests a fuller range of extracurricular offerings and more peer diversity within the school's own walls. Cobb (William L.) Elementary's smaller size may appeal to families who want a tighter-knit school community, and its exceptional growth score of 10.0/10 indicates the school is highly effective at accelerating student progress regardless of incoming achievement levels.