You can get the code for the like button here:http://developers.facebook.com/docs/reference/plugins/like/. Change the "URL to Like" to whatever the URL for your Facebook page is, make any other customization adjustments you want by following the instructions on the page, and then click the "Get Code" button.
Once you have the code, you can paste it into the Source view of any webpage. To do this, login to Music Teacher's Helper. Click Website ---> Website Pages ---> click "Edit" next to the page on which you'd like the button to appear.
Click the "Source" button on the editor's toolbar. It is in the upper left corner (1st button, 1st row). You will see the html code for the site in the box. Scroll down to find where you'd like to place the button and paste the code there.