What are skill points?
Skill Points are the points shown in the third screen of the tamagotchi's information (the first choice, represented by a little scale). They directly influence what character your tamagotchi will grow up to be. The three skill points are Social (the first symbol, represented by a little smiley face), Intelligence (the second type of skill, represented by a star/sparkle type thing), and Strength (the last skill, represented by a fist). These points are often called different things depending on where you look, but I will continue to call them the names stated above.
The games you play give you more skill points in certain areas. The skill points are as followed:
Climb, the game available for a tamagotchi at its baby stage, will give you a random amount of any skill point. Tug-of-War, available to children, will also distribute random points. At the teen stage, three more games are unlocked, named Apples, Shapes, and Man-Hole. Apples will give a set amount of Social skill points, Shapes will give a set amount of Intelligence skill points, and Man-Hole will give a set amount of Strength skill points. There are no more games available past the teen stage.
Once a tamagotchi reaches the teen stage, three selections of teachers are available. Each teacher gives different skill points when a game is completed. Mr. Turtlepedia, a turtle with a moustache, gives Intelligence points. Mrs. Flower, a potted flower, gives Social points. Mr. Canvas, a canvas with a face on it and a cape, gives Strenght points.
Hope this helps!