2 sentences for 小动作 (xiǎo​dòng​zuò)

1. 上课时，有些学生总爱搞小动作。

   shàng​kè shí, yǒu​xiē xué​sheng zǒng ài gǎo xiǎo​dòng​zuò.

   Some students always fidget or engage in sneaky activities during class.

   Source: Dong Chinese Dictionary

2. 他为人光明，从不在别人背后搞小动作。

   tā wéi​rén guāng​míng, cóng bù zài bié​ren bèi​hòu gǎo xiǎo​dòng​zuò.

   He is an upright person and never does anything underhanded behind people's backs.

   Source: Dong Chinese Dictionary