Depending on the products the answer sheets or other supporting materials should be available on Cambridge GO (https://www.cambridge.org/go/) or on our website (cambridge.org). You will need to create a free teacher account on Cambridge GO in order to access the platform and supporting resources. These be found under 'add new resources' on the upper right side of the screen. Some supporting resources are available on our Education site, on the page of your product, which you can search for here: https://www.cambridge.org/gb/education.
Please note that supporting materials are available only to teachers.