Support for New Models While few educators are professional evaluators, they must make decisions about technology use and methods. Bertram Bruce presents several factors that require new evaluation methods and support findings from earlier research, such as those related to the CBAM and ACOT™ studies. 15 Users adopt technology at different rates. Early adopters tend to be more adventurous and knowledgeable about technology, but evaluations must reflect the whole community of users. New technologies are seldom isolated entities and must be evaluated as components of larger, more complex systems. Technologies change rapidly, and standards and strategies for use may become outdated even as evaluation methods are being developed. Additional factors include new roles teachers and students assume when using educational technology, scale effects, technical characteristics, and the limitations of access. Did You Know? Other reasons for administrators to use new evaluation models include to increase capacity to use data-driven decision making to build support for their programs 16 to evaluate how teachers guide student interactions in technology-based activities 17 to combat high attrition rates in distance education settings 18 to evaluate potential problems early and guide further evaluation efforts 19