Learn French: L'étudiant triche et attend sa punition. - The student cheats and waits for his punishment.

The subjunctive is triggered by expressions of doubt, will, or desire (like vouloir que), and usually requires two different subjects. This sentence is just stating a fact, so it uses the standard indicative mood. If we added an expression of will—like "The teacher wants the student to wait" (Le professeur veut que l'étudiant attende)—then we would use the subjunctive.

Why isn't there a word for "for" after attend?

The French verb attendre already means "to wait for." Adding pour is a common trap for English speakers. You just place the object directly after the verb: attend sa punition.

If the student is male, why do we use the feminine sa for "his"?

French possessive adjectives agree with the gender of the noun being owned, not the owner. Because punition is a feminine noun, you must use sa, regardless of whether the student is a boy (l'étudiant) or a girl (l'étudiante).

Why doesn't the verb attend end with a t like many other third-person verbs?