Stick Pick is a classroom-management and -assessment app that takes the popsicle-stick-in-a-can concept digital and expands it to help teachers improve the way they ask questions in the classroom.
Classkick lets teachers create and share assignments, monitor students, and give feedback in real time as students work from iPads or computers.
ACT Academy is a K-12 resource library where teachers can search for, save, and assign multimedia content to individuals or groups of students.
GameMaker Studio 2 is the real deal; its drag-and-drop programming environment allows new game designers to jump right in and create 2D games.
Goalbook Toolkit is an online source for Common Core State Standards-based learning goals and teaching interventions.