Symbaloo Share Feature
You will need to go to the email that Symbaloo sends you when you first join and verify your account for this "share" icon to show up on your Symbaloo. If you did not do this and cannot find the email, contact Symbaloo and they will resend the email.
In the picture above, the "share" feature that has activated using the email from Symbaloo is located immediately below the yellow "SHARE" that I have written there to show you where it is located . You would need to click on the icon and then decide what way you will share. My suggestion is to share to the public or I will not be able to access your web mixes to grade them. You will then need to be sure to save the URL that will be given to you next. This URL will need to be sent to whoever your wish to share the webmix with. This is the URL you will need to submit to Blackboard for each webmix you want to share with your Instructor.