Hi when it comes to being a pilot does it matter how good your ACT or SAT is? will the scores be important when I go to ATP?
No one in aviation will ever see your ACT or SAT scores nor will ATP ask. My only caveat is that if you’re asking it suggests your scores are less than stellar. Flight training (particularly ATPs program) is challenging and requires a considerable amount of study and hard work. Be certain you’re up for it.
are there any online courses that might be helpful for ATP? like physics or math?
Much of ATPs program is self study and you will be provided with access to all the online material once you enroll. What I’m saying is access or not it’s not easy.
The airlines will never ask what your SAT or ACT score is.
There are not really any online courses that are helpful before beginning the program. Once you start, the online material will be coupled with hands on learning, which will really help the information to sink in.