Real-World Algebra Activity. Use A variety on Items around the classroom. Set a variable and a price to represent each item. (You can even allow the students to determine the prices). Have the students shop for items or create a shopping list for them.
Scientific notation guided notes & practice problems
Would You Rather Questions for the End of the Year - "icebreaker" type game where kids move to one side of the room or the other depending on their responses. Could be fun persuasive writing prompts for end of year.