くれる means to give, but it is used specifically when someone gives something to the speaker or to someone in the speaker's close circle (like a family member). It emphasizes the giver's kindness toward the speaker.
That is how Fuguro works. It brings くれる back for review right before you forget it, each time a little later, until it sticks for good. You hear it spoken aloud, and you meet it again in stories you can already read. The first five levels are free.