• District suggestions
    Math
    Make Change
    Kids Math
    MathBoard
    Numerate
    Ruler
    Math Quizzer

    Communication Arts
    Notability
    QuickOffice
    SpellBoard
    Sight Words
    Word Magic
    Story Wheel

    Social Studies
    GeoPlay
    GeoMaster
    World Atlas
    Stack the States

    Science
    Star Walk
    Science VL
    Science 360
    Over in the Ocean

    My additional suggestions
    Rover
    TED
    Google Earth
    Khan Academy
    Rocket Math
    The Presidency 
    Constitution
    Qrafter (or generic QR code reader)
    Splash Math
    NASA HD
    Toontastic
    Candy Factory
    Multiplication and Division Flash Action
    Mad Math Lite
    Slice it!
    Brain Pop
    Ansel and Clair's Adventures in Africa