From time to time, we give celebrities a chance to read some of the mean things people tweet about them. We extended that same offer to our Commander in Chief, who happily agreed. This is an all President Obama edition of #MeanTweets.

Actress, author, and neuroscientist Mayim Bialik considers open relationships. While she sees the benefits, there are certainly things she doesn’t “get” about this kind of arrangement, as she sees male and female biology clearly dictating different ideals.

Mayim shares her doubts and misgivings about open relationships. It seems that for her, the commitment, predictability, and closeness of a monogamous relationship is all together more meaningful and enjoyable.

The song “Girls Like You” comes from Maroon 5’s sixth studio album Red Pill Blues, and was re-released featuring Cardi B. The music video features appearances by a number of famous female actresses, comedians, musicians, politicians, athletes, and activists.

This is “Sugar,” from Maroon 5’s fifth studio album, V. For the video, the band set off across LA to crash as many weddings as they can. What a surprise for the happy couples!

"Nothing Breaks Like a Heart" is the lead single from British musician Mark Ronson’s album Late Night Feelings and features American superstar Miley Cyrus, with whom he co-wrote the song. It carries the unmistakable melancholy of something coming to an end, or as she sings, "Things fall apart, but nothing breaks like a heart."

The British band Madness had a major UK hit with this song, and with good reason: heartfelt and nutty in equal measure, it would bring the house down at every Madness show. The video — filmed above and below water — is one of their classics, with cameo appearances by Big Bird, a killer whale, and Labi Siffre, who wrote the song.

Lydia teaches us the weekdays, the seasons and the months in English. Listen closely!

Lydia teaches us how to tell time in English. Listen closely!

In this beginner-level video, Luana teaches us about plants. She talks about the functions of the various parts of a plant, and offers tips on watering plants that grow indoors and outdoors.

Do you know how to say the colors in English? What is the difference between a primary and secondary color? Learn all about them with Luana.

Let's learn the names of various kitchen utensils with Luana! We'll start with the utensils used to prepare and cook food, such as tongs, sifters, graters, knives, cutting boards, pots and pans...

In the second part of this lesson, Luana goes through the kitchen items we use to serve and eat our food, and explains how and when they are used.

In this video lesson, Luana explains the names given in English to our nearest and dearest relations: the brothers, sisters, cousins, parents, uncles and aunts that make up our family tree.

Luana guides us through some of the most common questions asked at job interviews, and gives us useful tips on how we might answer them, if we want to get that job!