However, the exact number of students affected is still unknown.
In a statement from the school, Mr Van Dam's employment was terminated the day after they heard of the complaint.
The statement went on to say: "This case is in the hands of our criminal justice system and we trust that justice will be served.
"Though the number of charges do not necessarily reflect the number of students, we are grieved again as we hear the extent of the charges.
"We've wept, now it's time to weep again. We've prayed, now we need to continue praying. We've brought our anger and fears to the Lord, and now we need to lay those feelings again at His feet.
"We praise God that your testimony has brought to light a dark secret that none of us adults knew was there.
"Please know that thousands are lifting you before the throne of your Father in heaven... trust Him to restore you completely."
In the wake of the events, the school encouraged students to inform the school if they had not done so already, of any abuse they had suffered stating:
"If this news especially hurts because you have suffered or are suffering abuse, we encourage you to bring it out of the realm of secrecy, so that it loses its powerful grip on you.
"We encourage you to talk to a professional Christian counselor."
The school also added 1 Peter 1:6-9 had "been especially encouraging" to them.