At the moment, we do not yet offer the functionality to have multiple teacher accounts linked to a class.
However, we do understand that one course might be taught by multiple teachers and that you would like to share access so that all teachers can monitor their students' progress.
Right now the only way to accommodate for this is by sharing your login credentials with your colleagues.
Alternatively, you can both set up a class with your students. The data on the work they complete will be shared across both classes in the 'Students' and 'Insights' tabs. Please note that assignment completion data will not be share between the classes but student attainment can be seen in both classes through 'Insights'.
You might also be interested in signing up for an SLT Seneca Dashboard. You can sign up here.