Sharing a Worksheet Template, Session Template, or Course with other coaches in your organization does not give them editing ability.

A coach must be the owner of a Template or Course in order to edit it. To reassign ownership of a Template, head on over to your Library, then choose either Worksheet Templates or Session Templates. 

Once you're on the template you want to reassign ownership, click the Reassign Ownership button.

Choose the coach you want to transfer ownership to, then click Change Owner.