just take note, UP does not allow home schooled kids to take the UPCAT. they need to know the weighted average for the last 3 years for them to allow you to take the UPCAT. so you can home school elementary level kids but if you plan to have them take the UPCAT they will need to attend all 4 years of high school in a formal school. my friend just had this problem, his kid aced the exams for high school aptitude (i forgot the name of the exam, the one taken by 4th year high school students for qualification to acceptance to college) but since the girl was home schooled UP did not allow her to take the UPCAT. he sent letters to the UP president and board of regents to no avail.

better ask around if other universities besides UP also have this policy.