If you are looking for a specific "best" scene featuring a "Mrs. Sanders," it may be a character name used in one specific episode (such as Liz Summers, who appeared in a 2007 classroom scene). My First Sex Teacher (TV Series 2003– ) - IMDb
In reality, actual romantic or sexual relationships between a teacher and a current student are illegal in most jurisdictions (Title IX in the US, safeguarding laws in the UK/EU). They are not "forbidden love"; they are a violation of ethics. The teacher holds the grades, the references, and the psychological authority.
