Johanna Oikarinen, who teaches at a suburban primary school in Helsinki, spends a week teaching a Year 3 group at a multicultural south London state school. Johanna has never taught in England and she'll begin by using the school's lesson plans to teach literacy and numeracy in the morning and other subjects in the afternoon. It will be a huge culture shock for Johanna, but by the end of the week she'll gain a greater understanding of why Finland are top of the international rankings and so far ahead of England in primary education.