Klein Oak High School performed excellent to earn a State accountability rating of A (90-100) based on three domains: student achievement, school progress and closing the gaps. Scores are scaled from 0 to 100 to align with letter grades. The school scored 89 in student achievement, 87 in school progress and 92 in closing performance gaps. It scored 90 overall in post-secondary readiness, a broad term that refers to student preparedness to undertake multiple pathways after graduation, or specifically, their preparedness for college education.

On the other hand, Klein Cain High School earned a State accountability rating of B. The school posted 88 in student achievement, 87 in school progress, 86 in closing performance gaps and 87 overall in post-secondary readiness.

A distinction designation acknowledges districts and campuses for outstanding achievement based on the outcomes of several performance indicators. Distinction designations are awarded for achievement in several areas and are based on performance relative to a group of campuses of similar type, size, grade span, and student demographics.

Distinction Designations for Klein Oak High School and Klein Cain High School are not applicable as neither one earned a recognition for outstanding achievement in seven categories.

Based on Racial/Ethnic Groups, Hispanics comprise the biggest group at Klein Oak High School. They make up for 38.88% of student population, followed by Whites or Caucasians (35.12%), African Americans (14.67%), Asians (7.28%), Two or More Races (3.65%) and Native Americans (0.32%).

The student population at Klein Cain High School is also predominantly by Hispanics at 39.63%, followed by Whites or Caucasians (29.57%), African Americans (15.17%), Asians (11.77%), Two or More Races (3.35%) and Native Americans (0.36%).

Based on household incomes, Klein Oak High School’s economically disadvantaged students is higher at 40.40% compared to 40.17% at Klein Cain High School.

In terms of Limited English Proficiency (LEP), a term used in the United States that refers to a person who is not fluent in the English Language, mainly because it is not their native language, Klein Oak High School has 433 English Language Learners or ELLS or about 11.55% of student population. Klein Cain High School has significantly more ELLs at 479 or about 12.23% of student population.

Klein Oak High School’s bilingual students comprise 11.28%, gifted and talented students, 9.49%, while 9.28% are in the special education program. Klein Cain High School bilingual students comprise 11.90%, gifted and talented students, 9.37%, and 11.16% are in the special education program.

Klein Oak High School's 221 teachers have been working at the campus for an average of 7.2 years with individual teaching experience averaging nearly 13 years. Klein Cain High School's 238 teachers have been working at the campus for an average of 5.6 years with individual teaching experience averaging close to 10.8 years.

Of its teaching staff, Klein Oak High School has seven teachers serving the school for over 30 years, has 44 teachers serving the school for 20-30 years, 63 teachers have worked for 11-20 years, 45 teachers have worked for 6-10 years, while 53 teachers have been serving the school for over 1-5 years, including ten beginning teachers. Klein Cain High School has three teachers serving the school for over 30 years, has 20 teachers serving the school for 20-30 years, 72 teachers have worked for 11-20 years, 55 teachers have worked for 6-10 years, while 75 teachers have been serving the school for over 1-5 years, including 14 beginning teachers.

In both schools, female teachers outnumber the male teachers. Klein Oak High School employs 129 female teachers and 91 male teachers. Of its teaching staff, 18 special education teachers are being assisted by 24 teachers aides or paraprofessionals. The school also employs 15 staff members in the school administration department and 23 more working as school support staff.

On the other hand, Klein Cain High School employs 150 female teachers and 87 male teachers. Of its teaching staff, 53 special education teachers are being assisted by 27 teachers aides or paraprofessionals. The school also employs 16 staff members in the school administration department and 22 more working as school support staff.