Glad to see you're going down this avenue.
As well as having students learn game and app development with Construct there is the advantage of having teachers themselves use it to enhance the classroom, not just in a computing lesson.
I am starting teacher training this year at the Primary/Elementary level and at my interview with the University I demonstrated a Construct 2 maths game designed for a whole class to play with the teacher, maybe on an interactive whiteboard. I think it would be a real advantage to be able to quickly custom build an app to help deliver a lesson, particularly in maths or science.
I really don't know whether Construct is a little too advanced for upper primary pupils to make games with, but i'd like to leave a few copies installed and merely point it out to some pupils to try in an after school club or something.