Let students learn how math concepts are connected to the real world as they design their own TINY HOUSE! Area, perimeter, and geometry-- math is everywhere in this project based learning activity (PBL). Designing, creating, and problem solving are key
Not free, but for those girls interested in science these are great Apps, problem solving whilst having fund rescuing Robots etc. If they are going to be on the computer, better it be science I reckon.