which idea is better: 1 html tutorial website ( will have html word in domain ) 2nd css tutorial website ( will have html word in domain ) or html + php + css + ajax + javascript + joomla + drupal + wordpress tutorials ( all in one domain name ) I can not select one choice becoz mini sites can rank well becoz of key in domain but all in one tutorials website is easy to update content. Content will contain Beginners tutorial and will not get update on daily/weekly base.
You build one big site that you want to push traffic and members to. You use small link bait sites with good domains, and good keyword rich description posts to manipulate the SERPS. Good luck.