Frederick Said:

Where can I find lesson plans on teaching a Letter of Introduction to high school sophomores?

We Answered:

Never, in my many decades, have I needed to write a letter of introduction, read a letter of introduction, or known anyone else who had ever written a letter of introduction. A cover letter for a resume would be of more value to your students - they'll probably use that someday.

Leona Said:

Where can I find lesson plans on teaching a Letter of Intoduction to high school sophomores?

We Answered:

First, let me apologize up front for a glitch with Y!A and the ability to hyperlink to the sites I have put in the source section. This has been ongoing for a few days now.

An introduction letter or letter of introduction is a letter that is used to introduce one party to a second party. There are three main types of introduction letters; business-to business, business-to-customer, and personal introduction letters.

7 tips for writing an effective introduction letter to introduce yourself
Whenever possible, address your letter to a specific person.

Begin your letter by stating your name and your position or role, if relevant.

Tell how you got the reader’s name, if applicable.

Give the purpose for your letter.

Indicate what it is that you hope to accomplish by sending your letter (for example, setting up a time that you can meet in person with the reader) or what you would like the reader to do in response to your letter (such as grant you an interview).

Include any other important information about yourself or the purpose of your letter (such as your contact information, brief history of your organization, your goals, or the like).

Close by thanking the person, and end on a positive note.

Above tells you basically what an introduction letter is, but a cover letter is usually something that goes on top of a report to summarize what is in the report, and indorsed by someone in power, i.e., a CEO or military commander. Also, Introduction letters should not be confused with cover letters that are used to transmit resumes and curriculum vitae and various business documents.

Raymond Said:

What is the difference between teaching in Elementary Level or in High School Level?

We Answered:

Yes, very much so. There is so much more discipline to be had dealing with kids in HS, as opposed to Elementary. Your LPs should be dictated by your team in collaboration in both"instances, especially in big districts, because they need to adhere to statewide standards, and what needs to be fulfilled and at what times throughout the year.
In elementary, you can be more creative, especially during the first semester. In our state (Texas), the second semester is all about getting the students ready for standardized testing, which is unfortunate, but required. I know this, because this is how it was during student teaching, as well as currently during substitute teaching. They even pull students out of classes for "testing boot camp" near the end of the HS year, especially the potential graduates.
At least, you have backup and support in security in HS when kids misbehave. Also, kids are more strong-willed, and less likely to complete lessons, but you have the option of failing them on less important assignments (others, not so much).
Finally, in our state, you really need to know Spanish for Elementary students. They often speak it in the home, and have a tough time speaking it in the classroom. They learn through the years, but the younger kids speak a lot more Spanish than English. They love you a lot more, though. And, they keep you on a routine. They know when they go to lunch, when they do this activity and that one, and there's always a good student to help you along.
Teaching is a lonely profession, and not for anyone who doesn't love the craft. You don't often get a lot of support, or an adult to talk to at the end of the day that knows how you feel/what you are talking about. Hope this helps. :)