<Tr> <Th> Original release </Th> <Td> August 23, 1998 (1998 - 08 - 23)--May 18, 2006 (2006 - 05 - 18) </Td> </Tr> <Tr> <Th_colspan="2"> Chronology </Th> </Tr> <Tr> <Th> Related shows </Th> <Td> <Ul> <Li> That' 80s Show </Li> <Li> Days Like These </Li> </Ul> </Td> </Tr> <Ul> <Li> That' 80s Show </Li> <Li> Days Like These </Li> </Ul>

What grade are they in in that 70s show