The speaker in the video said that exercise can improve concentration. He explained that physical activity increases blood flow to the brain and can help people stay focused.

The school newspaper published an article about students who work part-time jobs. The article explained that some students have difficulty balancing homework, work, and time with their families.

Jordan's teacher returned his essay with several comments. Jordan was reluctant to show it to his friends because he was worried they would see all the corrections.

The directions for the project were vague. They did not explain how long the presentation should be or exactly what information students needed to include.

The experiment produced unexpected results. The students expected the plant to grow faster with more sunlight, but the plant actually grew more slowly.

The cafeteria was unusually quiet. Students spoke in low voices and kept looking toward the doors. A teacher stood nearby, monitoring the room carefully.

The teacher asked the class to support their answers with evidence from the article. One student gave an answer but could not point to anything in the text that supported it.

The school announced that the parking lot would be closed for two weeks. Students were told to use another parking area while workers repaired the pavement.

The article described a student who had difficulty completing homework because his house was often noisy. He eventually began staying at the library after school, where he could work in a quieter environment.

The article explained that some animals are nocturnal. Instead of searching for food during the day, these animals are active at night when the temperature is cooler and there are fewer predators around.

During the science lab, the teacher told students to handle the equipment with caution. She explained that some of the glass containers could break easily and that students should move slowly.

yler's phone battery was nearly empty. He had forgotten his charger at home, so he was concerned that his phone would turn off before his parents came to pick him up.