You'll start this day in your room and for the most part, there's not too much to do in here.
You can pick the cookie box off the couch to put in your backpack, check on your computer which is broken, and look through your telescope at the neighbours. Head through the door to talk to Jenny who appears to be the daughter of the woman who has taken you in. After the conversation, you can change her name to something else or keep her as Jenny.
There's nothing to do with the two doors on this level so go downstairs and then into the kitchen to talk to your dad's old friend Debbie. She will offer your breakfast but you decline as you are running late. Before you can go she explains that her friend Diane could use some help with her garden and it might be a good way for you to earn some money. If you want to you can also change Debbie's name.
You can now access the map which lets you travel to various locations and if you open it by clicking on the logo on the top left-hand corner of the screen you can travel to Erik's house next door to your own. 
After a brief conversation with Erik you will unlock the school as a new location so use your map once again to travel there with Erik. School
Out the front of the school building, you'll meet Mia who confesses she needs a study partner and invites you over her house (and unlock it as a location on your map) any time you like to study.Next, inside the school, you'll have a heated encounter with Roxxy and Dexter who look like the Jocks and bullies of this school unlocking Roxxy's home The Trailer and the Basketball court new locations.
Principal Smith will then come over to scold you for standing around in the hallway and insist that you come to her office to talk about your failing grades. Go up the stairs by clicking on the doorway with the stair icon to your right and then up again by clicking on the stairs. Then choose the door labeled Principal to talk to Principal Smith.
Principal's Office
Inside you'll see Principal Smith who will explain you're failing all your subjects and doesn't care that your dad died. She's accompanied by Annie who she will send to help you get your things from your locker after you reveal you've forgotten your pass.
Go back into the hallway and down the stairs and select your locker from the left hand side of the screen. Annie will open your locker with a 'master key' which opens every lock in the school (which you make special note of) so you can get your things. In your locker is a to-do list with names and checkboxes on it, your report card, and a trading card. You can take the trading card and add it to your backpack.
Once you're done head to the boy's locker room by selecting the door with the toilet icon over it. Locker Room
You'll run into Judith who explains that the girl's change rooms are out of commission so everyone is sharing the boy's room. She says she feels nervous about having to get changed in the co-ed environment so you offer to go with her and make sure no one looks - including yourself.
Choose the boy's locker room and you'll both head in. Annie from before is also there and scolds you for being late. She demands you both get changed immediately. 
You both disrobe and are completely naked. You get an erection which leads to more scolding from Annie before she hands you your sports uniforms and insists you head to class. Leave the locker room, back to the school hallway, and go outside to get to your athletics class.
Athletics Class
Coach Bridget will approach you and get you to try to do pushups which you are not very good at. She will tell you you need to start working out at the gym to get strong enough for a passing grade in her class. This will unlock the Gym as a new location.
An athletic girl called Ronda will come over to talk and you will make a deal with her that if you manage to make the trials she will help you practice and that she'll be at the swimming pool. This adds the Swimming Pool to your locations. 
Go back to the school hallway and click on the door with 'A B C' on it to attend Mis Bissette's class. 
French Class
Miss Bisette greats you and asks how you're doing before giving a message to the class explaining she plans to reward the student who showed the most improvement. She offers private tutoring to anyone interested and says to talk to her in her office or tomorrow in class if you're interested.
The Library location will also unlock. 
Control will be returned to you while still in French class but school is over. It's a good idea to talk to the goth girl with blue hair named Eve before you leave to unlock the Park location if you want to hang out with her later. After School
Once you leave you'll have a scene with Erik where you recap some of your options for the day and he'll also tell you you can buy new computer parts at the Consum-R mart.
Diane's House, The Mall, The Beach, The tree house, Raven Hill, and The Warehouse, will all unlock as locations. At this point you can choose whether to go to talk to Miss Bisette in her office or talk to her tomorrow. You can also choose whether to go to Diane's house to garden or hang out with Mia.
Doing these things will take up time turning it to evening. Where you can choose from other activities such as visiting the park before heading home to rest. When you get home Debbie will be on the phone being harassed by debt collectors. You comfort her before heading back up to bed to sleep.
In the days following you'll be able to choose how you spend each portion of your day including whether or not you go to school or which classes to take.