Milk and Cheese:  

• Dairy industry overview;
• Fat (cream, butter, ice cream);
• Protein (acid vs. rennet, casein and cheese, whey, cottage cheese, yogurt, sour cream);
• Sugar - Lactose (mei chalav);
• Water and minor components;
• Creating chalav Yisroel;
• Yotzeh v'nichnas;
• Video cameras;
• Creating gevinas Yisroel.

See seforim by Rabbi Cohen at www.kashrushalacha.com