* Latin: Latin grammar was incredibly complex, requiring a deep understanding of declensions, conjugations, and syntax. It was often taught through rigorous memorization and strict discipline, making it a significant hurdle for many students. Furthermore, its practical application was limited for most students outside of further classical studies.
* Mathematics (especially Geometry): While arithmetic was relatively straightforward, geometry and higher-level mathematics relied heavily on deductive reasoning and complex proofs. The teaching methods often emphasized memorization of theorems rather than intuitive understanding, increasing the difficulty.
* Classical Literature (Greek and Latin Texts): Understanding ancient Greek and Latin texts required not only fluency in the language but also a grasp of historical context, cultural nuances, and often challenging philosophical concepts.
It's important to note that subjects like physics and chemistry were also challenging, but their difficulty stemmed more from the lack of advanced equipment and sophisticated understanding compared to today. The abstract nature of Latin grammar and the rigorous deductive reasoning demanded by mathematics and classical literature made these subjects particularly daunting for many students in 1900. The prevalence of rote learning in many schools likely exacerbated the difficulties across the board.