The field of education bubbles over with controversies. It's not unusual for intelligent people of good will to disagree passionately about what should happen in schools. But there are certain precepts that aren't debatable, that just about anyone would have to acknowledge are true. While many such statements are banal, some are worth noticing…

Four years ago, teachers at International High School in Austin, TX, thought they were doing a great job. Visitors to the school for new immigrants often praised the faculty for working with such a diverse population of students, some of whom had no prior formal education. Aida Walqui's observation was different. The director of WestEd's Quality…