They say that “A google a day keeps the bad citations away.” Although I pretty sure that they are the marketing department for Google.
Nonetheless, “A Google A Day” is the gamified version of Google Search.
It asks you a question, and gives you access to a google search (devoid of spoiler ridden autocompletes), and awaits your answer. There is a countdown, and point system. While difficult for primary students, and a bit above junior students, it should be just fine for 7-12. I find it is an excellent second part to an independent search skills lesson.