I keep getting undefined for the School Catelog project

Here is my code down below: When I do lorraineHansbury.quickFacts(); I get Lorraine Hansbury educates undefined students at the Primary school level.

class School {
constructor(name, level, numberOfStudents) {
this._name = name;
this._level = level;
this._numberOfStudents = numberOfStudents;
}
get name() {
return this._name;
}
get level() {
return this._level;
}
get numberOfStudents() {
this._numberOfStudents;
}
set numberOfStudents(newNumberOfStudents) {
if(typeof newNumberOfStudents === ‘number’) {
return this.numberOfStudents = newNumberOfStudents;
} else {
console.log(Invalid input: ${this.numberOfStudents} must be set to a number!)
}
}
quickFacts() {
console.log(${this.name} educates ${this.numberOfStudents} students at the ${this.level} school level. )
}
static pickSubstituteTeacher(substituteTeachers) {
const randInt = Math.floor(Math.random() * substituteTeachers.length);
return substituteTeachers[randInt];

}

}
class PrimarySchool extends School {
constructor(name, numberOfStudents, pickupPolicy) {
super(name, ‘Primary’, numberOfStudents);
this._pickupPolicy = pickupPolicy;
}
get pickupPolicy() {
return this._pickupPolicy;
}

}
class HighSchool extends School {
constructor(name, numberOfStudents, sportsTeams) {
super(name, ‘High’, numberOfStudents);
this._sportsTeams = sportsTeams;
}
get sportsTeams() {
return this._sportsTeams;
}
}
const lorraineHansbury = new PrimarySchool(‘Lorraine Hansbury’, 514, ‘Students must be picked up by a parnet, guardian, or a family member over the game of 13.’);
lorraineHansbury.quickFacts();

In the School class,

// You wrote:
get numberOfStudents() {
this._numberOfStudents;
}

// Change to:
get numberOfStudents() {
    return this._numberOfStudents;
}

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