They engage college undergraduates to teach computer science to high school students, who in turn instruct middle school students on the topic.

他们聘请大学本科生向高中生教授计算机科学，而高中生反过来就这一主题对中学生进行指导。

youdao

I will instruct you and teach you in the way you should go; I will counsel you and watch over you.

我要教导你，指示你当行的路。我要定睛在你身上劝戒你。

youdao

Only human would open classes to teach others by their poor little knowledge. All days they chatter to correct this and instruct that.

只有人才会以他自己那一点贫乏的知识开班授徒，一天到晚唠唠叨叨地纠正这个，指示那个。

youdao