Click the ruler to take it, then click the globe twice to spin it, revealing a piece of gum. Take it.

In your inventory, drag the ruler to the gum to combine it. Use the sticky ruler on the airvent to find a rubber band. Use the rubber band on the teacher to knock his glasses off.

Pick up the glasses then leave the classroom.

Enter the library.

The librarian complains of poor eyesight, so give him the glasses. As a reward, he gives you a free bookmark.

Leave the library.

Take the penny from the floor, then go left.

There is another penny on the floor. Take it, then enter the supply closet.

Combine the bookmark with the gum: and: ruler to make a longer stick, then use it on the dime on top of the bookshelf to knock it down.

Leave the room, then enter the men's room.

Click the cubicle door to open it, the take the toilet paper. Use the paper on the toilet, then click the flusher to clog it. The janitor will arrive to fix it. Leave the bathroom and go left.

Take the penny from the floor, then go upstairs.

Go right.

Enter the janitor's closet.

Take the quarter under the chair, then leave.

Click the shaking locker. Richy has been locked inside, and has forgotten the combination. He asks you to find Mrs Oddverb.

Go back downstairs, and into the teacher's lounge.

Choose "Mrs. Oddverb, about Richy...?", "He's stuck in his locker. His combination is in your class", then "Yes."

After the teachers leave, click the middle drawer to find a nickel.

Leave the room and go left twice.

Enter Miss Count's room.

Hiding among the monkey dolls by the teacher's desk is the A key from a keyboard. Take it, then leave and go back upstairs, then go right twice.

Take the penny from the floor, then click the first yellow locker to open it; take the nickel from inside.

Click the door to enter Mrs. Oddverb's class.

Take the combination from the desk, then go back to Richy's locker and click it.

Click the combination paper to bring it up. The paper is actually upside down, and doesn't say BLOBBLES, but 53788078.

Enter this into the combination lock and click the unlock button. Richy will give you a quarter as thanks, and mentions that he collects buttons.

Go left twice.

Take the penny from the floor, the enter Mrs. Flask's room.

Drag the keyboard key to the button printing machine; it'll make a SCIENCE ROCKS button badge. After the cutscene, click the button to take it, then go back to Mrs. Oddverb's class.

Give the button to Richy. He'll give you another quarter as thanks.

If you've collected all of the coins up to this point, you'll now have exactly $1.

Go back downstairs, then left and into the lunch room.

Talk to Mrs. Munch and choose "I'd like chocolate pudding." In exchange for the dollar, you'll receive a big vat of pudding.

Go back upstairs and give the pudding to Chubb to get him to move.

After the cutscene, leave the auditorium and go back upstairs and enter the office.

Choose "I was sent here to see Mr. Potato", then "I'm awesome" to enter Mr. Potato's office.

After the cutscene where you steal the key, the only thing left to do is return downstairs, and go left to the door to escape.

Easter Egg: In the library, you can find a book that warns you not to complete the game twice "or else you'll meet a certain fate".

If you do, the end cutscene will glitch, replaced by an evil monkey doll.