Good teachers are in high demand in the U.S. By 2020, we’ll need 440,000 more to keep up with the growing brood of kids ages 5-18. This is great news if you’re passionate about working with youngsters to hone their knowledge and help them grow. The better news? The Department of Education (DOE) has a few suggestions about in-demand teachers for the future. Take a look at these specialties as you carve out a career plan.