There are 40 students in our after school "Minecraft Club" (each student has their own Minecraft account). It is routine that many of the students are unable to login because our school's IP address becomes temporarily flagged for "throttling".

I found a prior thread where one of Mojang's Mods suggested this is due to multiple incorrect credentials being submitted (https://bugs.mojang.com/browse/WEB-707). The mod also suggested this might be solved by use of the authentication server's white list.

Is it possible for our school's IP address to be white listed? If so, how do we submit the request?

If this is not an option, is there a way to save (error free) credentials locally so that students do not have to enter them manually each time? (These computers are powered off at the end of each day).

Thanks.