The COVID-19 outbreak represented a remarkable challenge
in universities
and colleges since it forced the transition from a face-to-face model
in classrooms and laboratories to a remote, online model using computers,
tablets, and cell phones. In Mexico and other Latin American countries,
the return to educational activities was a slow-paced process. The
lack of presential activities had a deep impact on education, particularly
in under- and graduate Chemistry courses, where laboratory work allows
students to develop skills and abilities by applying their knowledge
to solve experimental problems. As a consequence, institutional and
personal efforts were put together to overcome this situation. These
efforts led to remarkable experiences and outcomes with high educational
value. This work presents experiences and outcomes of the Instrumental
Analysis course offered in the Chemistry Clinical Biologist bachelor
program throughout three nonconsecutive semesters, each time on different
contexts, to describe the challenges faced, and the emerging opportunities
from the experience throughout the pandemic. Each experience is described
in a case study. Case 1 exemplifies a regular, pre-COVID-19 semester,
in 2019, in a fully face-to-face teaching modality. Case 2 describes
a semester in the middle of the COVID-19 crisis in 2020, in a 100%
online teaching modality. Finally, Case 3 presents a semester with
low prevalence of COVID-19 cases, using a hybrid modality, in 2021.
Our observations suggest significant differences related to the knowledge
integration process when laboratory work was interrupted, and provide
evidence about how online activities impacted the learning process
in experimental chemistry courses.