1. I broke them up into separate lines, but the head and title tags could have been on the same line.

2. Most tags must have an open and a close in XHTML.

3. there is a blank line after it
When you save, you need to use either a .html or a .htm extension.

4. This is the title.
Notice the name has the .html extension.
These are headers in tags <h1>, <h2> and <h6>. Notice that the text gets progressively smaller. They are in the body.
of text.
will not validate because the This is a line text is not in a container.
Note that I closed body and html.

5. The </p> could have been on the same line.

6. Notice that embedded spaces and carriage returns have no impact on how things look on the page.

8. <br />

9. Note that I have a break in a paragraph and then another line
Note that I have a break in a paragraph and then another line. It is written on the very next line. A new paragraph woud have caused a blank line inbetween.

10. </ol>
Now I am doing an ordered list - I made a mistake which we will see in a minute. Instead of closing the ordered list I made a new ordered list.

11. with 1, 2 and 3.
Should have been </ol>
I have not run with the unordered list yet.

12. slides.
second output did not indent.

13. I have gone to the validator and am attempting to validate
I have gone to the validator and am attempting to validate. Note this is after I fixed the close tags.

14. It validated!

15. This shows the right list output, unfortunately it does not show the fix - you will just have to trust me!

16. It is prefered that you do this with cascading style sheets which we will discuss soon.

18. I added some things and it still validated.