Obstacles to the integration of ICT in education: results from a worldwide educational assessment. - Willem J. Pelgrum (Comput. Educ., 2001)

SITES2006-International comparative survey of pedagogical practices and ICT in education. - Tjeerd Plomp; Willem J. Pelgrum; Nancy Law (Educ. Inf. Technol., 2007)

School and teacher factors associated with frequency of ICT use by mathematics teachers: Country comparisons. - Willem J. Pelgrum; Joke Voogt (Educ. Inf. Technol., 2009)