To find the number of jazz classes given, you can divide the total number of classes by the number of class types.
The dance school offers 5 types of classes: jazz, tap, hip-hop, ballet, and lyrical.
So, the calculation is: \[ \text{Number of classes per type} = \frac{\text{Total classes}}{\text{Number of types}} = \frac{950}{5} = 190 \]
Thus, the number of jazz classes given is 190.