Activity 1: Show the powerpoint, having students list all of the pregnancy symptoms they can think of from the very beginning to the very end. Give about 5 minutes to do this. Then go through slides 3-4, revealing several of the common symptoms. I always made it into a game, having students highlight the ones I said, whoever had the most highlighted won.
Activity 2: Distribute the Trimester Match worksheet as well as the symptom cards. I typically make those on colored paper. Have students cut and arrange where they think the card goes based on trimester. Don't have them glue until you go over it column by column to ensure they have the correct symptoms. Key included.
Activity 3: Cards with various pregnancy symptoms. Laminate and cut apart and play Pictionary with as a review, introduction, whatever works!