HOW MUCH PROFESSIONAL DEVELOPMENT IS NEEDED TO EFFECT POSITIVE GAINS IN K–6 STUDENT ACHIEVEMENT ON HIGH STAKES SCIENCE TESTS?

RT @dylanwiliam: More professional development for primary teachers meant more progress their students in science: http://t.co/g50mykgj (abstract only)

RT @dylanwiliam: More professional development for primary teachers meant more progress their students in science: http://t.co/g50mykgj (abstract only)

RT @AuthorZone: RT @dylanwiliam: http://t.co/UVZkWUxI More professional development for primary teachers meant more progress their students in science:

RT @dylanwiliam: http://t.co/UVZkWUxI More professional development for primary teachers meant more progress their students in science:

RT @dylanwiliam: More professional development for primary teachers meant more progress their students in science: http://t.co/g50mykgj (abstract only)

RT @dylanwiliam: More professional development for primary teachers meant more progress their students in science: http://t.co/g50mykgj (abstract only)

RT @dylanwiliam: More professional development for primary teachers meant more progress their students in science: http://t.co/g50mykgj (abstract only)

More professional development for primary teachers meant more progress their students in science: http://t.co/g50mykgj (abstract only)