Yes, but they do...
Here, schools are obliged to teach that who abolished slavery was Princess Isabel, like if she was some sort of heroine and the emperor had nothing to do with it, also all the other anti-slavery laws he passed, are usually dismissed (for example, one of the laws the emperor passed was prohibiting the slavery of children of slaves, schools here dismiss that law by saying that it is so impratical that noone would obey anyway, without even giving proof if people obeyed or not).
Also, several of the things done in the first years of the republic were for example rename streets and parks that had any relation to the monarchy or slavery (even if it had to do with slavery abolition)...
During the school I (and everyone else I asked) was taught that Emperor Pedro I independence was shit because he did not abolished slavery with it, and thus if existed non-free people the country was not free at all and still a pawn of Portugal (as with one thing had to do with the other), and all school books give much emphasis on how slavery was not abolished during the independence... I even saw one book that teach (Wrongly) that during US independence they abolished slavery, as a sort of "proof" of how true republics are inherently better because they get rid of slavery.
Also, NONE of the history books mention slave demograhics, and only teach about plantation slavery (that was really akin to US slavery), I don't found a single school book that mentions other forms of slavery (like voluntary indentured servitude), or urban slavery (that in Brazil was the majority, despite most of the free population living in rural areas), or that only 1% of the slaves were actually chained into the infamous "Senzalas" (plantation slave barracks) that he books teach so much about (all history books explain of all evils of the "Senzalas").
Also, not one single book mention who broughts the slaves here in first place (it was not white people... the brazillian first generation slaves were almost all war prisioners or imprisoned criminals that africans came here to sell... Yes, they came here, many people believe portuguese bought the slaves at Africa, this of course happened, but was not the normal course of action, black slavers came to Brazil in portuguese ships, bringing the slaves they wanted to sell here).
Also most school books here don't talk at all about Pedro II technology achievements for example (even in Campinas where I lived most of my life, people don't know that most of public colleges there were made by decree of Pedro II, neither they know that Campinas was the second city in the world to have a telephone system, that Pedro II in person brought there after visiting Mr. Bell in the US during his vacation).