Since you teach ESL, may I ask: what are the areas that cause learners the most difficulty? All the different tenses of our verbs? How about the placement of words to form a more complex sentence? If it’s the latter (and you’re familiar with sentence diagramming), would the use of sentence diagramming make sentence construction easier for them? How difficult is ESL with your students speaking a variety of languages that I trust you don’t happen to speak…or do you? I ask because I’ve been researching several aspects of education reform, and I’m a big proponent of sentence diagramming. Thanks for the heads up as to today’s devices.