Hello my friend, Professor Ahmed is a computer science teacher for more than 19 years, during which I taught all computer languages to students from different countries of the world, most of whom were from America, Canada, Australia, Saudi Arabia, the Emirates, Qatar and Bahrain.I achieved excellent results with them and they are still continuing with me. I invite you, my dear brother, to attend a trial session to agree on the points you want to explain. I await your communication.