The configuration in my classroom is 14 client based workstations pulling a desktop from several central servers along with wireless devices running over our network. I have discovered that the Chrome browser is not as efficient at managing the resources required by code.org programming puzzles. The workstations would freeze then disconnect requiring the students to log back into our network and into code.org. Very frustrating. I found that Mozilla Firefox works MUCH better. I made it through the entire day today with 40 students (2 classes) and no crashes!