The phrase "a first set of topics" is correct and usable in written English.
It can be used when introducing an initial group of subjects or themes for discussion or exploration.
Example: "In this meeting, we will cover a first set of topics related to our project goals and objectives."
Alternatives: "an initial group of topics" or "a primary set of topics".
A second set of topics that we'll address in the course will take off from a particular philosophical example that has become quite popular in contemporary discussions of morality, but which is actually traceable, about 40 years old, to some writings by Philippa Foot, and the philosopher Judith Thomson.
A first set of questions was drafted by one author (JW) according to relevant topics taken from the literature on barriers to incident reporting.
All intercalating (IC) students complete a core course on foundations of medical research, a second set of core topics that are related to clinical or laboratory-based research (depending on the student's research project), then a 20-week research project which is written up as a thesis.
Then the researchers asked a second set of questions on unrelated topics.
Dr. DiSarno is selecting representative questions on similar topics, and a second set of answers will appear on Booming next Wednesday.
So the second set of topics that I want to let you know we'll be talking about is the following: What is it that explains the differences in our reactions to these cases?
The first set of techniques is topic-based sampling, where specific keywords or hashtags are applied to collect tweets through Twitter API [6, 20].
The first set of questions covers broad topics related to preferred place of death.
Using a loose topic guide, the first set of interviews are aimed at developing understanding about the meaning and significance of tooth loss, its course over time, the strategies employed to manage it, accessing treatment, treatment choices, preferences and expectations about outcomes.
The topics for the first set of interviews were physical health, psychological health, and health products; the second set of interviews covered health information in the media, information needs and information-seeking behaviour.
