Two-thirds of the students at Baker Middle School take music. There are 834 students who take music. How many students are there at Baker Middle School?
If there are $S$ students at Baker Middle School, then $\frac{2}{3}S$ students take music.  Setting $\frac{2}{3}S$ equal to 834 and multiplying both sides by $\frac{3}{2}$, we find that there are $\frac{3}{2}\times 834=\boxed{1251}$ students at the school.