Best Chocolate Chip Cookies. There's no substitute for a good chocolate chip cookie that does exactly what it says on the label. If I were you, I'd double this recipe! You can find this recipe in Homemade Happiness - you can buy your own signed copy by clicking on the image (New Zealand residents only sorry).
"Challenge capsules" for students who finish early-- keep those high achievers moving. I love the choice/surprise element here. It makes it a privilege, not a punishment. If we make sure the activities aren't just more of the same, this is great idea!