Don’t use gender specific terms if there are gender neutral alternatives. If necessary, use a gender-neutral, singular 'they' instead.

Even though some jobs may be dominated by one gender, your training language should be tailored to all employees.

While gender-neutral language does not improve learning directly, it shows sensitivity and removes a possible distraction.

For example, which question is more inclusive? 

What should you do if your coworker tells you she had an accident with the forklift?

     or

What should you do if your coworker tells you they had an accident with the forklift?

The use of the singular they hasn't been adopted by all grammarians, so another way to avoid gender-biased language is to use characters and scenarios.

For example, the following question can be rewritten as a scenario.

Original question: What should you do if your coworker tells you she had an accident with the forklift?

Scenario question: What should you do if your coworker, Sarah, tells you she had an accident with the forklift?