Hi Luoy,
Thanks for the reply.
Just to elaborate a bit further (not sure if I should start a new thread).
The main reason why we use custom fields for the teachers to upload their materials now is because the rich-text editor in CRED does not function properly. For instance, the "add media"-button does not work when you use CRED forms to create new content
See these threads (one is my own):
http://wp-types.com/forums/topic/unable-to-have-basic-form-with-add-media-and-add-attachments/
http://wp-types.com/forums/topic/media-insert-button/
http://wp-types.com/forums/topic/insert-media-button-not-working-in-cred-forms-when-creating-new-content/#post-218627
So, for me these two issues are related.
That set me to wonder what would be the best way for users (in our case teachers) to upload content.
Is it through the rich-text editor or custom fields?
Thanks in advance.