Turning soil, pulling weeds, and harvesting cabbage sound like tough work for middle and high school kids. And at first it is, says Abby Jaramillo, who with another teacher started Urban Sprouts, a school garden program at four low-income schools. The program aims to help students develop science skills, environmental awareness, and healthy lifestyles.

这是2023年高考英语新全国卷2阅读理解B中的一段。请问文中的middle and high school 是什么意思？中学和高中？