I’m in my eighth year teaching in Denver Public Schools. I have spent my career teaching in Montbello, where a majority of my students qualify for free and reduced lunch. I have a master’s degree in English, and at High Tech Early College, I teach primarily concurrent enrollment classes, for which students receive both high school and college credit.

For the last five years, I have been rated “distinguished,” the district’s highest evaluation rating for teachers. That rating, plus my degree and the fact that I teach at a high-poverty school, means I benefit from many aspects of our current pay system, known as ProComp.

So I’m watching the Denver teacher’s union negotiations for a new pay scale closely. And I’m concerned.

For one, I believe that my distinguished rating reflects my hard-earned successes in the classroom. The union has advocated successfully to end bonuses tied to evaluations under the new contract, which is disappointing. I see that change as funding less effective teachers at the expense of others, and I worry they could drive strong teachers from the district.

But far more important to me are the existing bonuses for teachers who work in high-poverty schools. The union is advocating to shrink bonuses for teachers in Title I schools to $1,500 from $2,500, and redistributing the rest to increase everyone’s base pay.

I can tell you from experience that schools where many students qualify for free or reduced-price lunch — an indicator of poverty — face complex and often painful challenges. We don’t talk enough about how, all over America, most poor kids go to school with poor kids and rich kids go to school with rich kids. That means teachers in schools like mine aren’t working with a few students arriving with challenges — behavior problems, unaddressed trauma, worries about being undocumented, for example — but often entire classes of students who need special attention for those reasons.

If those bonuses keep shrinking, what incentivizes teachers to teach at schools like ours? If it’s the same pay at two schools, what will bring teachers into the places where we need them the most? A sense of vocation and moral purpose, for sure, but that ignores reality. Turnover at my school is relatively high, and evening out teacher pay could make it worse. Students at those schools deserve great teachers who stick around.

To be clear, I love High Tech, and I’m not going anywhere. And I’m not anti-union. All teachers should be compensated for the hard and important work that they do, and I’m excited to see pay rise for everyone. I don’t believe that strong base pay and bonus money for qualified educators are mutually exclusive.

But the union’s stance on high-poverty schools is indefensible. I hope it reconsiders.

Alison Corbett is a teacher at High Tech Early College and was a 2017-18 Teach Plus Colorado Fellow.