Blue Cross Learning resources for all ages in Google Classroom. Blue Cross has produced short, bite-sized online lessons to help children and young people learn about looking after pets. All curriculum-linked tasks have quizzes and activities to keep the session fun. All lessons are categorised by age and key stage with an indication of how long it will take, to help you find the most suitable one for your child. For younger age groups, you may need to help set up Google Classroom and supervise where necessary.