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We Are Now Enrolling Students For 9th Grade!

All current 8th grade students who reside in Allentown can apply. There are no admission criteria. A lottery will be held if there are more than 150 applicants.

Why Choose Building 21?


You will be known and cared for here. Our school is small—with 450 students, you will get to know all of your teachers and classmates. We care for one another even when we make mistakes—our discipline system is built on the philosophy of forgiving and making things right, not punishing. And this caring show in our results—90% of our students graduate on time!

we value

We open up a world of opportunities for you by connecting you to people and places beyond school. We’ll help you explore career interests, participate in internships and summer programs, visit colleges and connect to our community. You’ll be paired with an advisor who you’ll see every day and will help you build your path to success. Our students are out in the community over a thousand times in a typical year.

we foster

School is different here. We work on real-world problems and use our creativity to solve them together. We know that every student is different. From projects to personalized learning plans—you will find many ways to explore your unique interests and develop your creativity.  Our students use their creativity and critical thinking skills to make an impact in the world.

For more information, call 484-765-4401 or visit our webpage for details on open house dates

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