Simplify the following text for a Grade 9 native English-speaking person.
Original: The islands are collectively referred to as the Ionian Islands , and other islands include the Strophades , Sphagia , Schiza , Sapientza and Kythira .
Simplified: The islands are most of the time referred to as the Ionian Islands , and other islands like the Strophades , Sphagia , Schiza , Sapientza and Kythira .