Polyglot training for starters: learn multiple languages at once (Russian, French, Spanish, Serbo-Croatian)

He is very knowledgeable about many subjects and is willing to find the answer to any question he doesn't already know. He is very patient and kind and clear when he instructs someone. He has been a valuable resource over the 17 years that we've been home schooling our children. He is flexible, reliable and punctual, as he values other people's time as well.