Hi @lxhoang,

Thanks for your submitting. Good work 👍
In summary, your submission is quite good. You have finished all required stories and half of optional stories.
And below are some suggestions that can improve your blog:

• Always be cautious with user input, you can use Active Record Validations to validate (like required condition for article title).
• You could have a article about yourself and should not allow users to update/delete the article about yourself.
• You should display articles with the newest descending order for better usage.
• Good point for using bootstrap, you can use it to improve other pages like detail, create, edit. One small suggest that you should set width: 20rem and using col-sm-offset class to center the article element.
• You can move the html code of the site header and navigation bar from index.html.erb to layout/application.html.erb so navbar and header also display in other views like details, edit view.
• Also render Markdown in detail view, currently it still displays raw text.

There is still time, so why don't you work on the remaining optional features this weekend, especially comments and tags stories so you can understand more about Model association in Rails, we will continue to review your submission and provide help if you need. Good work man!
Let us know if you have any questions by commenting here.

Best regards,