A new day.

There is nice weather today.
I got up at 6:45 today. Then I washed my face and brushed my teeth.
I go to the playground to running on Friday every week.
There are so many people on the playground.The students were practicing running for the competition under their coach's supervision. Many elderly were dancing to the music. Some women were playing badminton.
I ran around the playground which 200 meters in the shape of a circle.I ran 6 laps and feel tired. My head was covered in sweat and I walked back home.

a new day

It's a nice weather today.
I get up at 6:45 today.Then I wash my face and tooth.
I go to the playground for running on Friday every week.
There are so many people on the ground.The students are practising running for engaging the competition under their teacher's coach.Tens of elderly people are dancing in the music.Some women are playing badminton.
I run around the playground which 200 meters a circle.I run 6 rounds and feel tired.My head is full with sweat and I walk back home.

A New Day

It's nice weather today.

I got up at 6:45 a.m., and washed my face and brushed teeth.

I go to the playground to run every week on Friday.

There were so many people at the playground.  The students were practicing running for the competition with their teacher's coach. [Did you just mean they were practicing with their running coach?  I'm not sure who "their teacher's coach" is talking about.]  Lots of elderly people were dancing to the music.  [You don't say "tens of people", you just use "lots of people", "many people", "a lot of people", or use a number like "around 20 people" or "about 45 people".  You can say "hundreds of people", "thousands of people", or even "tens of thousands of people", though.]

Some women were playing badminton.

I ran around the playground, which is a 200 meter circle.  I ran six rounds and felt tired.  My head was covered in sweat, and I walked back home.

Hope that helps! ~~^^