On the weekend. Israel: sensei why did you call me out here so early. Kakashi: well as you know your element has just recently activated. Israel: yeah when Shaun and me where fighting but I just have a sword. Kakashi: that's why we are starting your training right now so that you will be ready if Shaun comes back. Israel: alright just tell me what to do. Kakashi: first summon your sword. Israel: ok. Israel summons his sword. Israel: now what. Kakashi: channel your elemental energy into the sword. Israel trains for two weeks until finally he was able to put his elemental energy into his sword. Kakashi: your training is now complete. Israel: alright I did it.
Kakashi: you have now advance to the rank of expert.