MORGAN HILL -- After weighing passionate arguments on both sides of the issue, the Morgan Hill Unified School District board on Tuesday denied a petition by Navigator Schools to open an elementary charter school in August.

In a 6-1 vote, with trustee Rick Badillo dissenting, the board agreed that the petition did not meet state requirements. Interim Superintendent Steve Betando, who recommended denial, called the concerns about the petition "alarming." His evaluation said the proposal has an unsound educational strategy and had issues in the areas of testing, staff qualifications, budget and governing board. The petition also lacked the required number of signatures.

Betando concluded that the school was not likely to succeed.

"We feel disappointed and angry," said parent Rosa Rojas, mother of three children in Morgan Hill schools. She has been hoping that a charter school would help her fourth-grader, whose needs she feels are not being addressed in school.

Latino parents, working with the advocacy group People Acting in Community Together, have been pressing the district to improve education and options. Morgan Hill's algebra proficiency for low-income students are among the lowest in the county.

In a meeting that lasted until 11:30 p.m. parents spoke in favor of Navigator charter, the district's teachers spoke against it.

Many parents also attended the meeting in the Britton Middle School gym to support a petition by Rocketship Education to open a K-5 school. The board will take action on that petition next month.

Navigator had proposed opening Morgan Hill Prep School in 2014-15 with 180 kindergarten through second- grade students, then wanted to successively add a grade a year to reach 540 K-8 students.

Navigator runs Gilroy Prep, whose second- and third-graders scored 942 last spring on the state's Academic Performance Index, putting it in the top echelon of schools serving primarily poor and English-learning students.

The charter operator may appeal to the Santa Clara County Board of Education, which has been friendlier to charters. Last week, the county board approved on appeal a petition to create Alpha Middle School 2, with grades 6 through 8. The petition had been denied earlier by the Alum Rock Union School District.