This is a simple 1 page worksheet I created to think about and observe changes in our Sea Urchin Embryology Lab.
There are several labs out there, or you can use your own sea urchins in your salt water tank. Once gametes are collected, introduce eggs and sperm to a sterile petri dish.
The data sheet has boxes to sketch what you see under the microscope as the embryo progresses.
The worksheet is in Microsoft Word, so you can amend it as needed to be most helpful for your class. :)
If you have any questions - I'd prefer you ask me BEFORE purchasing rather than leaving less than flattering feedback after purchasing. :)