I've tried looking up this word in dictionaries + translate tools, it all say the word 「うめる」means is "to bury". So what does it mean in this sentence?
わかるところからうめるようにしましょう。
I read it on the start section of a textbook, so I guess it means something like "this book will explain everything a little by little", but I'm not sure is it true or not.