The explanation was shallow at best, omitting key definitions, coming up with Newton-style "infinitesmall" hand waiving. They mostly made sure we were familiar

The explanation was shallow at best, omitting key definitions, coming up with Newton-style "infinitesmall" hand waiving. They mostly made sure we were familiar with relevant notation. This somewhat helped in early uni physics-related courses, until calculus caught up. That was in a math school back in post-soviet lithuania, so russian approach to math schooling implied.