She decided to start an afterschool program where children participated in STEM-based competitions.

她决一个课外项目，让孩子们参加以 STEM 为基础竞赛。

Well, you may be the only younger one in your year, but you know we have a lot of afterschool activities you can join in, and so this way, you'll be able to meet new friends of different age groups.

好吧，你可能是同届里年龄，但是你知道是有很多课后活动供你参加，这样话你就可以与不同年龄人成为新朋友。