Morning (2008) looked at high school biology textbooks during the 1952–2002 period and initially found a similar pattern with only 35% directly discussing race in the 1983–92 period from initially 92% doing so.
Morning (awatay wan 2008) ikyad daɣ alkittaban win biology n lakkol wan ammas daɣ awatay wan 1952 har 2002 tolas ijraw dumu olahan s 35% ɣas issewalan fal tawset daɣ awatay wan 1983 har 1992 s tizarat 92% ɣas a ijjan awen