Anna Sikorzynska

Choices Upper Intermediate Students' Book

By Michael Harris, Anna Sikorzynska

New Opportunities: Education for Life. Elementary

By Michael Harris, David Mower, Anna Sikorzynska

Opportunities: Pre-intermediate. Teacher's book

By Michael Harris, Patricia Mugglestone, David Mower, Anna Sikorzynska

Opportunities: Upper intermediate. Teacher's book

By Michael Harris, David Mower, Patricia Mugglestone, Anna Sikorzynska

Opportunities: Intermediate. Teacher's book

By Michael Harris, Patricia Mugglestone, David Mower, Anna Sikorzynska

Opportunities: Elementary. Teacher's book

By Patricia Mugglestone, Michael Harris, David Mower, Anna Sikorzynska