副ふく読とく本ほん

noun

supplementary reader; supplementary textbook

An additional book used alongside a main textbook, often in school settings, to provide extra material or practice.

• 授じゅ業ぎょうでは教きょう科か書しょのほかに副ふく読とく本ほんも使つかいます。

  In class, we use a supplementary reader in addition to the textbook.

• この副ふく読とく本ほんには練れん習しゅう問もん題だいがたくさん載のっている。

  This supplementary textbook contains many practice exercises.