Hopefully you are able to spend some time doing all the inductive study methods with his chapter, it is worth it! Here are the section titles laid out:

1. parable of the tenets.          cautionary tale 
2. taxes.                                      pharisees/herodians
3. resurrection                           sadducees
4. greatest commandment.   law
5. Christ, son and Lord?           prophecy and interpretation 
6. warning of idolatry.              scribes
7. widow's offering.                  encouraging tale

Sadducees and Pharisees  

• S- strict interpretation 
  • very literal
  • politically savvy and involved
  • Sanhedrin participant
  • reject ideas of unseen (heaven, hell, spiritual world)
• P- oral interpretation
  • importance of tradition 
  • over time interpretation is equal to the law
  • Sanhedrin participant 
  • accepted ideas of unseen 
• Resources:
• s vs p article: https://www.jewishvirtuallibrary.org/pharisees-sadducees-and-essenes

Law of marrying your brother in law: Deuteronomy 25:5-6
Blue Letter Bible Commentary: https://www.blueletterbible.org/comm/guzik_david/study-guide/mark/mark-12.cfm?a=969001
my website: https://www.deborahjmckenzie.com/