Answer:
Verifiable sources, like university or government sites. For history, museums often have good reliable information.
Step-by-step explanation:
When researching topics for school, it's really important to make sure that your information sources are credible and not written by an amateur or someone who has little experience in the field. Nobody wants to be putting false information in their work and get a bad grade!!
hope this helps, feel free to ask any questions in the comments :)