About our sources

We were lucky enough to develop this project at a time when a lot of material is available online to nourish our own work. We wanted to take a moment to give credit to the people and organizations whose content was the most useful to us.

Each unit has a homework section where we recommend reading material or videos that the student can watch. This was made possible by online magazines and video content creators. You can visit their websites by clicking on the icons below.

Choosing what content to teach in each unit is an enormous task because we want to pock grammar and vocabulary that is exactly of the right level. Thankfully, there are organizations like Cambridge that have done extensive research on the subject and have generously made their findings available online for free. Sources for this are below.

Finally, we wanted to thank our main image providers.