No grade 1 on choose course mastery

Hi Benaffleck2016,

The Kindergarten and 1st Grade course content has been combined into the Early Math course, which should be assignable as a Mastery Goal and contains the most up-to-date content. We've also transitioned Pre-K through 2nd Grade content to the Khan Academy Kids platform, so it is recommended that parents and teachers use this instead of the regular Khan Academy website for students aged 2-8.

For more information on this, I suggest visiting the Khan Academy Kids page and the Khan Kids help center.

I hope this helps! Please let me know if there's anything else I can do for you!