Giúp mình sửa lỗi bài này với ạ

Computers are an important part of our lives because they have many benefits. First of all, computers help me format my lessons effectively due to their flexibility. For example, I often type my lessons on the computer and format them to make them attractive, so I can learn them quickly and review them conveniently. Secondly, computers help me entertain after a tiring day of work and study. During school breaks, I often watch movies on my computer to relax and prepare for the next lecture. Third, computers help me keep my documents safely for future revision. For example, computers have helped me store lots of childhood pictures without any damage. In conclusion, computers are a modern tool that has made life very easy and simple.