Sea Urchin Embryology Back to Contents page






SUMMARY - In the labs and lessons you will find INFORMATION LINKS above the title, a SUMMARY BOX under the title and ON PAGE LINKS just below the summary. A CONTENTS link appears on the masthead of most pages and brings you back to the contents page.

This page includes information about how best to make use of this SEA URCHIN EMBRYOLOGY web site. The information on this site has been used by thousands of classrooms throughout the world.



See PATH OF DEVELOPMENT for a visual overview of sea urchin development using the animations that have been generated for this web site.
The CORE LAB is a lab using sea urchins to demonstrate fertilization and early development and takes about 1 week (days 3,4,5 only 15 min/day). This is the recommended lab if this is your first time doing the lab or time is limited.
The PRIMARY LABS are a set of labs which extend the CORE lab experience over a longer time period (2+ weeks)and in greater depth.

EXTENDED RESEARCH with suggestions for in depth research projects.

Since students may not all have the necessary knowledge, abilities or experiences to make full use of the CORE or PRIMARY labs we have included SUPPORT LESSONS to help acquire these skills and reinforce concepts.

In INFORMATION we give support material for the teacher to help design and refine their own adaptation of the prepared lessons.
CURIOSITY gives information about the authors of SEA URCHIN EMBRYOLOGY and how and why this site was created.
EMAIL gives you the opportunity to contact us for more information or to make comments.


In the writing of the lessons & labs we have used a consistent order of presentation which includes:


Using the animations from this site will make it much easier for students to understand sequences of events that occur at fertilization and subsequent development. There are several ways these animations can be presented to your class.
This is the easiest to do, but has several drawbacks. Certain times of the day tend to be "crowded" making download times unusually long. Uncle Murphy will dictate that this will happen at the most critical time in your presentation, aaagh! You may not have a network link in your classroom or it may be down.


1) You will need a web browser on both the computer with which you access the web with and the computer you intend to view the animations on (they may be the same computer).
2) It is best to save the animations to the hard disk, because the speed of the hard disk will play the animations more smoothly. None of our animations is larger than 500K. This will allow you to save to flash drive for transport, if necessary. To save, follow the instructions just below the animation. (or go to the raw animation list and select the animation you want and then choose FILE, then SAVE AS from the browser menus). This will save only the raw animation, not the description next to the animation. It is best to print the page with the animation & description, since saving the raw animation will not include this support information.
3) You must open the browser first! Once open, under the FILE menu, choose OPEN FILE or OPEN LOCATION, locate and choose the animation file. Your browser will then load and play the animation. If the image is too small, you may be able to adjust the screen resolution on your computer to a lower resolution. The lower the resolution you set your screen to, the larger the animation will appear. You may need to consult the computer expert at your school.
NOTE) If you are trying to save both pages and graphics, set up your hard disk with the web pages saved in a directory (folder) entitled "Urchin" and then set up a sub-directory (folder) entitled "GIFS", which is where you put the graphics files. In this way you will not need to rewrite any of the HTML code.

C) The entire web site is available as a single ZIP file. You are free to download and put on machines that otherwise might have a hard time connecting to the net.


LINKS on this site will be blue in color until used at which time they will turn to purple.
OVERHEADS - takes you to a page of links to the masters for classroom presentations and/or written student assignments. (S) Spanish now too!
GLOSSARY - takes you to a guide to terms used in the texts. Some terms will link to further resources.
REFERENCES - takes you to a page of books, articles and links to other resources.

SKILLS - takes you to a page describing the necessary prior knowledge, experiences, and/or abilities useful for each lesson/lab.

CLASSIC - takes you to the education school classic lesson plan. Some adminstrators require these, especially of new teacher. Here they are done for you.

TROUBLE - some helpful suggestions for when things go wrong. Mostly on the lab pages.

These links will vary with the page in question but in all cases the link will take you to a location on the same page. This allows you to quickly get to the information needed.
The CONTENTS link on the masthead takes you back to the CONTENTS page of the SEA URCHIN EMBRYOLOGY site.
There will be other LINKS on most pages taking you to extended support at this web site or outside web sites.


Controls will vary with each web browser, but we have purposely avoided some of the fancier web page extensions to facilitate more universal use.
We recommend that you begin by making a bookmark/favorite for our home page.
Do make extensive use of the LINK buttons. This is the real power of the web over the printed page.
Each lesson/lab page has been designed so that if you PRINT the page using the PRINT command on the toolbar, enough information will be included to do the lesson/lab without having to chase down links to other pages and sites.