What teeth whitening strips work better after braces?

I just had my braces taken off and would like my teeth whiter before i start school… any strip that reallly work? and if i combine strips with whitening toothpaste will that speed up the process?

Where can I buy teeth whitening gel/beach that I can use with braces?

Most teeth whitening treatment I’ve seen requires the special mouth trays but I don’t think this will work because I have braces? A gel that I can just put on the teeth would be good. Any tips?