LOGO (Computer program language) 27 Programming 11 Computer-assisted instruction 7 Apple II (Computer) 4 Apple computer 4 Computer graphics 3 Study and teaching 3 Apple II Plus (Computer) 2 Apple IIe (Computer) 2 Computers and children 2 Educational technology 2 Algebra 1 Commodore 64 (Computer) 1 Computer programming 1 Data processing 1 Electronic data processing 1 Franklin Ace 1000 (Computer) 1 Geometry 1 Study and teaching (Primary) 1 Study and teaching (Secondary) 1 TRS-80 color computer 1 Teacher participation in curriculum planning 1