Will name brainest what does el cuaderno mean?

(i put) la carta dentro de uno de estos.

Okay so i'm taking an online spanish course (penn foster), and in the study guide, you have to create a bunch of sentences with words you've learned so far. translating, reading, and those kinds of things are fairly easy, but when it comes to making my own sentences, my brain just kinda waltz's away. anyone got any tips?

Write a paragraph, in spanish, giving advice to a friend about the dos and don’ts of staying safe at the beach.