The sources of info we use are selected based on criteria to maximize reliability.

1- government-provided (like

2- content offered by non-profit organizations

3- non-sponsored content (unless the only info or best info available happens to be sponsored, in which case we make sure it is clearly marked as sponsored) 

4- content that appears highest in search engines and/or that is created by demonstrable reviews of students and users (excluding sponsored content as described in 3), I.e. content that is consulted most frequently by people and/or provided by renowned sites or organizations. 

5- when available always share content from at least two resources to avoid bias.