I actually pursued a dual degree - one in special education and one in elementary education. I had to complete two internships - one for each major. That meant I was in school an extra semester to complete the work. I'm happy I did! I became a special education teacher for many years, but then decided I wanted to just be a regular teacher and could because I had the elementary certificate. I'm still teaching today and both majors have made me the best teacher and I learned so much.
Look into several colleges to see what they offer and how long it will take you. I went to Bowling Green State in Ohio and I highly recommend it. But, there are great schools all over the US. You want to find out first - what will be my dual major (what do you love); then - which school offers me the best path. Start looking now. I decided on Bowling Green in my junior year of high school. Great decision and I'm happy for having a dual degree!