"During the class" is correct and can be used in written English.
Example: "During the class, the teacher explained complex theories and encouraged students to ask questions."
During the class, you'll soak up advice on everything from wellbeing to mindfulness and healthy eating.
During the class you'll learn about the psychology behind our addiction to email.
During the class, I'll emphasise the importance of getting the reader's attention and sustaining their interest.
During the class, you'll explore questions you wish you'd asked during physics class.
During the class, I'll share advice on how to work with the soil and let nature do the hard work.
During the class, you'll get involved in practical activities, which will help you to write stories that children will love.
During the class, you'll receive expert advice on everything from storytelling to research and the craft of good writing.
During the class, I'll discuss why science, health and environmental stories have no protection from the journalism maelstrom.
During the class, you'll develop an idea for a story you want to write, with opportunities for feedback.
During the class, attendees will be encouraged to discuss their idea for a blog or personal website.
During the class, students will compile the same step in a program many times.
