Complex sentence: In 1999 he obtained a PGCE (Post-Graduate Certificate of Education) from Christ Church College in Canterbury, England, and in 2000 he worked as a secondary school science teacher at St. Edmund's School, in Dover, teaching 11 to 16 year olds.
Split into simpler sentences: In 1999 he obtained a PGCE (Post-Graduate Certificate of Education) from Christ Church College in Canterbury, England. In 2000 he worked as a secondary school science teacher at St. Edmunds School in Dover, teaching 11 to 16 year olds.