For four decades, my kindergarten and 1st-grade students have gone each week to construction sites to observe and to meet workers and learn about their jobs. I want my students to meet and respect the people who are building our city. During the last eight years, we made friends with workers building the Second Avenue subway.

Over the many years, construction workers have taken time to show us how to mix concrete correctly so that it will be strong and the structures will last. There’s a real recipe. Remember when you added too much salt or too much water to a cake mix?

We interviewed workers who inspected concrete. They also explained the importance of having the correct mix for concrete.

Nearly 20 years ago, I saw an article in The New York Times about the company that provided defective concrete for Trump’s Riverside South project [“Trump Project Went On Despite Warning About Concrete,” Nov. 4, 1997]. The buildings department halted work until the defective concrete slabs and columns were replaced.

I told that story to many of my students over the years. I do hope they will remember it as they think about a candidate who had no problem cheating on concrete, putting people’s lives at risk — all for the dollar.

Paula Rogovin, PS 290, Manhattan