Simplify the following text for a Grade 8 native English-speaking person.
Original: Fluency shaping approaches are often taught in intensive group therapy programs , which may take two to three weeks to complete , but more recently the Camperdown program , using a much shorter schedule , has been shown to be effective .
Simplified: Fluency shaping approaches are normally taught in groups therapy programs , which may take two to three weeks to complete . More recently the Camperdown program , using a much shorter schedule , has been shown to work well .