The term "online learning" is notoriously slippery. One person's PDF handout is another person's webinar.
While defining the way you deliver training online to community health workers might be confusing to the uninitiated, there is a method that the industry follows. Here's a handy little guide to how e-learning is delivered, which is summed up in two words: asynchronous and synchronous.
Asynchronous: Learning At Different Times
Asynchronous means that learners may be in the class together, but they're not online at the same time. One person might log in to review their work in the morning, while another logs in at midnight. They're reviewing the same information, they even might be completing assignments together, but they do their work at different times. The work gets done when the learner does it. There may or may not be a facilitator or instructor with asynchronous learning. Examples: