And the idea is you fast forward and good students start failing algebra all of the sudden, and start failing calculus all of the sudden, despite being smart, despite having good teachers, and it's usually because they have these Swiss cheese gaps that kept building throughout their foundation.
Jika anda melangkau ke depan, anda dapati pelajar cemerlang gagal dalam algebra, dan gagal dalam kalkulus  secara tiba-tiba, walaupun mereka bijak dan guru mereka cemerlang. Ia seperti ruang dalam keju Switzerland  kerana asas mereka tidak kukuh. Ia seperti ruang dalam keju Switzerland  kerana asas mereka tidak kukuh. Jadi, model kami ialah,  belajar matematik seperti anda belajar apa-apa pun,