Data projectors starts to influence learning environments around 2012
Grader A: hit
Grader B: hit
agrees with A, without seeing its verdict
Audit: confirmed
in the fixed audit sample (D11)
Published: hit
Grader A: hit
NCES 2009: 72% of teachers with LCD/DLP projectors used them sometimes or often for instruction; availability far above 5% before 2012.
Test: at least 5% of US public school teachers had projectors available/used by 2014
Grader B: hit
NCES 2009: 72% of public school teachers used LCD/DLP projectors sometimes or often for instruction, well above 5% before the placement.
Test: At least 5% of US K-12 teachers/classrooms used them by 2014.