Answer:
No, because many federal courts have agreed that public schools may not force students to stand during the pledge of allegiance because it breaks the students first amendment rights.
The U.S. Supreme Court ruled that requiring all public school students to recite the pledge of allegiance was a violation of their First Amendment rights, because free speech includes the right not to speak against your beliefs (West Virginia State Board of Education v. Barnette, 319 U.S. 624 (1943))
Now, if you were in a private school, they can do whatever they want and could force you to do this