I'd say your next lesson will be 2hours of ground school to cover the ground based exercises 1 and 2, charged at ground school rate, and another hour in the air with its breifing and de-breifing hour - which you will pay for as 1 hour of flight instruction. Total of 4 hours.
Some schools separate these, so that the second lesson (after the air experience flight) involves all the ground stuff, checking out the aircraft, taxying etc, but doesn't include any flying. This isn't free, but isn't charged at flying rates.