Young teachers join the faculty; students plan a walkout because of the administration's apparent lack of concern for student issues.

Harsh echoes resound from the student riot; the Danny-Marla confrontations lead to racist allegations against her; a drug deal entraps one of Guber's prized pupils.

Misconduct charges target Guber, who's up against a new superintendent; race issues fester between Marla and Danny; reckless student driving sparks reproach.

A sex scandal among teens rocks Winslow and prompts a mock trial of the accused instigator, a clean-cut senior who's defended, prosecuted and judged by his peers.

Senate's erratic behavior rattles Ronnie and prompts a telling showdown with Harper; pupil misconduct provokes a new teacher, whose youth belies grit.

Harper's meeting with a parent becomes heated; a new teacher stirs things up in the classroom; the teachers must evaluate one another.

A jailed Harper faces a manslaughter charge in the death of a student's father; a rebellious teen receives unsolicited help from Hanson, who uncovers the youth's dark secret.

Brooke feels guilty about leaving her father alone during the holidays; Lipschultz debates accepting his son's Christmas invitation; Marla and Kimberly are stranded at Doyle's during a snowstorm.

A teen's pregnancy sensitizes Guber; a gang slaying deeply affects Kimberly and her prize student; romantic liaisons have differing impacts on Ronnie and Hanson.

Harper has concerns about Brooke's infatuation with the star basketball player; Flynn is attracted to a student's mother; a boy enters an online auction to buy a night with a beautiful girl.

A star basketball player is on the verge of losing his eligibility to play; Becky tells Flynn her mother is having an affair.

Guber's speech team star has an issue, Russell decides on a college, while mixed signals rattle Colin as his affair comes to a close.

Kimberly is stalked by one of her students; Lipschultz celebrates Valentine's Day with Guber's mother.

A shy student with a powerful voice belts out a song; Hanson tries to help a 12-year-old genius who has no friends.

Marla berates Aisha and the other performers in the school musical; the incumbent mayor grills Harper about low test scores; students land a juicy story about a teacher for their news broadcast.

Hanson's troubled sister drops off her 4-year-old daughter for him to watch; Marylin urges Aisha to stand up to her boyfriend; Ronnie and Marla vie for the position of assistant principal.

Tensions surface over Ronnie's new post; Aisha's participation in the school musical and her relationship with J.T.; Harvey's required recertification; and Danny's care for his niece.

Courtroom drama energizes Ronnie, who's defending two teens in a murder arraignment; high test scores by poor students prompt Guber's undercover investigation.

Sudden fame heartens Ronnie, credited for high exam scores posted at Winslow, yet she's also facing a romantic crisis with Zach; a student-council election tests a shy, awkward teen.

Aisha's ailing father leaves a song manuscript in her possession, and she writes lyrics for the melody.

Hanson asks Claire to marry him; a student uses rap music to critique Shakespeare; a producer pushes Aisha to sign a record deal; Lifehouse performs at Doyle's Bar.

A student writes a letter to Whitney Houston asking her to attend the prom with him; Harper tries to prevent teachers from being fired for budgetary reasons; Danny asks Claire's father for permission to marry her.

Ronnie witnesses an attempted rape, then receives a shock when she presses for legal action on behalf of the victim (guest star Amanda Fuller); Hanson tries to prevent a student from being expelled for drugs.

After a cheerleader is attacked, blame falls on another student's mother (Sean Young); Carmen goes head to head with a ""bad boy"" student (Milo Ventigmilia); Hansen copes with a student who says he is the son of God.

A female student files a serious sexual-harassment charge against Danny; a classroom debate over the U.S. involvement in Iraq turns violent; the tension between Harper and Guber over Marylin reaches the boiling point.