This is source b, do the same thing to get mastery level

Source B The Project for More Learning is an organization that advocates for extended learning time. The following orit of 21owens s Tweets appeared on their Twitter page, sorabive atolbsulrod" 10 "forlw of paiblogsA", sigmaxe Project for More Learning Follow @ProjectforMore1 We strongly support the growing movement for mandatory Saturday school. Our young people deserve the best public education possible. By committing an additional day of school every week, we move closer to delivering that excellent education. 1:57 PM - 30 Aug 2019 12 Project for More Learning @ProjectforMore1 - 14m Research shows that young people forget a great deal of content every weekend - by making Saturday school mandatory, we can reduce the amount they forget by 50% and ensure that they learn far more each year of school. 9 1 Project for More Learning @ProjectforMore1 - 14m oin us in supporting nationwide, mandatory Saturday school