  Emerging research shows that individual differences in how people use
technology sometimes cluster by socioeconomic status (SES) and that when
technology is not socioeconomically inclusive, low-SES individuals may abandon
it. To understand how to improve technology's SES-inclusivity, we present a
multi-phase case study on SocioEconomicMag (SESMag), an emerging inspection
method for socio+economic inclusivity. In our 16-month case study, a software
team developing a learning management platform used SESMag to evaluate and then
to improve their platform's SES-inclusivity. The results showed that (1) the
practitioners identified SES-inclusivity bugs in 76% of the features they
evaluated; (2) these inclusivity bugs actually arise among low-SES college
students; and (3) the SESMag process pointed ways towards fixing these bugs.
Finally, (4) a user study with SES-diverse college students showed that the
platform's SES-inclusivity eradicated 45-54% of the bugs; for some types of
bugs, the bug instance eradication rate was 80% or higher.
