JAKARTA — Annisa Nurul Jannah, 11, was learning about how devices transmit heat, sound and electricity. “I like science because it teaches me a lot,” the sixth grader at Petamburan 04, a school in a working-class part of Jakarta, said about her favorite subject. “I’d be sad if it was removed from school.”

Millions of children in Indonesian elementary schools may no longer have separate science classes starting in June, the beginning of their next school year, if the government approves a curriculum overhaul that would merge science and social studies with other classes so more time can be devoted to religious education.

A draft of the proposal was posted online in November and December for public comment. The government is analyzing the feedback and will meet with a team of experts shortly to develop new lesson plans.

Ibnu Hamid, an Education Ministry spokesman, said feedback showed that people generally agreed with the curriculum changes but were worried that there would not be enough time to train teachers and prepare new books. The comments have not been released to the public, however, and some critics question whether they truly reflect broader opinion.