The 'no regular science class' is actually a indicator of adherence to Common Core. Everything is either Math instruction or English Language Arts (ELA). Social Studies and Science are generally taught as units of ELA and not subjects of their own until Middle School.

That said, STEM fields have historically sucked at diversity and outreach to disadvantaged populations. It's hard to do science with no budget for supplies. It's getting better(tm) with programs like FIRST.