Step 1: Log on to your Facebook account. If you don't have a Facebook account, creating one takes just a few minutes.
Step 2: Click the down arrow next to the word "Search" on the left side of the screen. This will give you a drop-down menu of search functions.
Step 3: Select the "Find classmates" option from the drop down menu. It will take you to another screen when you can enter your school information.
Step 4: Fill in the "Search by high school" information box. Enter the country, state, city and the name of your high school. It appears that you can no longer enter the date of graduation and a specific name of a classmate as optional choices.
Step 5: Click the button that reads "Search for classmates" and it will bring up every person listed to have graduated from that school in that year. You can then add those people as your friends.