Young Ninja Group (ages 3-5)

I have reached the point in calculus where every new lesson seems connected to something I learned weeks ago. If I forget one step, the whole problem falls apart. While searching for help, I saw take my Calculus Exam and realized what I really need is stronger practice with the basics. I am thinking about going back through earlier problems before touching the newest material. Has anyone done this close to an exam? Did reviewing the foundations make the harder questions easier?

I thought getting help with website writing would simply mean sending someone a topic and waiting for a draft. After talking to a friend, I realized there is much more planning involved. I am now considering a content writing service and want to prepare everything before contacting anyone. I have started listing the audience, page goals, tone, and important points. For those who have worked with content writers, what other information made the biggest difference in getting a useful first draft?

My website has a relaxed voice because I wrote most of it myself over several years. I now have more content planned than I can handle alone, so I am looking into an affordable writing service for extra support. My biggest concern is keeping the new pages from sounding too formal compared with the old ones. If you have brought a new writer into an established website, what helped them copy the general tone without simply repeating the wording from existing pages?