After lunch/ recess, Jack brought 3 cups of a "drink" he made (a mixture of IZZI and Milkshake) to the classroom, against my advice/ wishes. Once in the classroom, he was insistent that I drink one. Things escalated quickly, as I refused. He became angry and physically aggressive. I tried to leave classroom to get assistance/ advice but he stopped me by blocking me in hall and pushing me. A lot of pushing in the hall. I told him it was unacceptable to be physical. I knew I had to let someone know, so i of course tried to text . He then took my cell phone. A few minutes later, he became emotional and opened up about his parents wanting to send him to boarding school next year and that he does not want to miss out on what is left of Dominoe's (his dog) life. He also expressed lingering grief over his dog Callie's passing last year. He stated he would not get to see her again for 71 more years. Profound. Jack then started building anew fort while I was logging him in for testing. He began test in fort, but never started it. He was trying to hack into computer (again.)