The top reported proficiency rate is 78% in English language arts. The lowest is 31% in Science.
Original Research by School Decision on Sam Johnson El
Sam Johnson Elementary serves kindergarten through fifth grade in Celina, a rapidly growing suburb north of Dallas. The school enrolls a school community that is majority white, with substantial shares of Asian, Hispanic, and Black families. Free and reduced-price lunch participation is very low, reflecting the overall affluence of the area. The school is part of Prosper Independent School District, which sits in one of the fastest-expanding cities in the nation and has been managing growth through recent campus openings and staffing increases.
On state testing, the school shows mixed performance across subjects and grades. In English language arts, proficiency rates rise sharply as students advance: third grade reaches a solid level, fourth grade performs slightly higher, and fifth grade reaches a notably strong rate. Math proficiency is more uneven. Third grade performs at levels comparable to ELA, fourth grade dips considerably, and fifth grade recovers to a respectable place. Science in fifth grade is a clear soft spot, with proficiency well below other subjects tested.
Across all performance bands, the school's overall proficiency index places it in the top quartile among Collin County districts. This reflects genuine strength in foundational skills and reading, particularly by the upper elementary grades. The fourth-grade math dip warrants a parent conversation with the school about what is happening at that level and how support is structured. Science at fifth grade is notably weaker; a parent may want to ask about instructional time, resources, and any specialized preparation or intervention happening in that area.
Celina itself is a place of sustained, rapid change. It was once a small ranching community and has become the fastest-growing city in the nation. Much of the new housing is in large master-planned developments with parks and green space. Families move here for newer, more affordable housing than central Dallas while seeking a small-town feel that still partly defines the area. Most of the workforce commutes to job centers like Frisco and McKinney rather than working locally. Housing values in the area are substantial but have recently moderated; mortgage rates and rents both carry real affordability weight for families.
Prosper ISD has lowered its effective property tax rate in recent years, keeping it at its lowest level since a specific point in time, though rising property values mean the tax obligation has moved upward in absolute terms for existing homeowners. The district is simultaneously managing explosive enrollment growth, having opened four new campuses recently and continuing to hire principals, assistant principals, and counselors. This expansion is likely to continue. For a family choosing a school, that means ongoing change in class size, building conditions, and staffing availability as the district absorbs new students.
Sam Johnson's location and student body place it squarely in an affluent, expanding suburban setting with families moving in for housing and lifestyle. The school's test results show genuine competence in reading and early math, with a real weakness in science instruction and some inconsistency in math as students move through grades. Neither of these patterns is unusual for schools of this type, but they are worth understanding clearly before enrollment.
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