Given the worldwide spread of digital technology and the Internet throughout modern life, students' everyday education increasingly includes components or activities that use digital software or online resources. While more extensive data collection is certainly a novel and valuable feature of online environments, the authors place their attention and effort on a less frequently cited but tremendously important feature of incorporating digital online resources alongside in-person instruction. This abstract describes the design and implementation of illustrative examples of three kinds of experimental approaches the authors have taken with collaborators. While the extent to which the designs seem obvious and natural is a positive indicator of the quality of their design, it should be noted that these are selected from a wide range of other possible approaches that might have seemed reasonable but would not have been possible or successful in implementation. Tables are appended.